05 One-Sample t-Tests in SPSS - SPSS for Beginners

[@LeoTracks1]

Learnt more from you about spss within 1 hour than watching my previously recorded hours of lectures from Uni.. Thank you very much :)

[@ResearchByDesign]

What a great comment! Thank you so much. Keep watching.

[@mynameistaztheboy8929]

sir what is the difference between standard deviation and z score ? and could u give an example, please?

[@rishikamalik4752]

standard deviation is a measure of dispersion- it tells you by how much individual values are different from the mean. another word for stan dev. is volatility. Z score is simply a way to standardize individual values in a sample. think of a z score as a scaled, or standardized version of a value. the formula to arrive at a z score is: (Value- Mean)/Stan deviation

[@mahnazmakhdum7263]

@@ResearchByDesign zv😢 has always🎉z😊🎉W🎉🎉 p tryy TY 😢😢🎉😊🎉 🎉

[@sellaliridha5366]

There is a statistically significant difference between both your attentiveness and need of these info at the time you were at Uni and the time you watched this (p < .05)

[@coopernutrition]

Thank you Dr. Daniel. I'm a professor and STILL need refreshers on SPSS! You are THE only person I can learn about SPSS with and I so appreciate your sharing your knowledge in such an accessible way. The ego-less approach is wonderful! - Dr. Christen Cooper, Pace University

[@ResearchByDesign]

Wow, thank you! That is a high compliment from a professor. It is always great to get positive feedback but it means even more when it is from someone who is also in education. Please tell your students about the channel. Best to you.

[@coopernutrition]

I shall indeed tell my students. I'm a scientist (I am an Ed.D in Nutrition Education and I really. stumble with statistics). I "get" the whole picture of stats, but analyzing my own data gives me a sense of terror. I think it's conditioning as a young girl who was always at the top of my class who fell behind (when I was a teenager, with boys screaming out answers in class) in math. I know math is NOT statistics, but still, it's numeracy knowledge, which I feel I lack!

[@josephkitabo2891]

Dr, I thank you and appreciate you a lot.

[@janelawless3198]

The COVID pandemic has separated me from on campus learning. These videos have been a life saver! Thank you

[@ResearchByDesign]

Great to hear! I am grateful that students are finding the videos and using them when they can't be in the classroom. Stay healthy!

[@marystarr8689]

Dr. Daniel is brilliant! He makes the concepts easy to follow...and I almost feel like I get it when I am done watching!

[@ResearchByDesign]

Outstanding...thank you for such a wonderful comment!

[@asmarehaklogh7]

Efficient time (management), precise explanation, not boring presentation. Thank you.

[@ResearchByDesign]

Glad it was helpful!

[@nofx18]

I have never seen someone explaining something so damn great like you! This is what I call a TEACHER! Thank you!

[@ResearchByDesign]

Thank you so much...what a wonderful comment. Hope that you find other videos on the channels that are equally helpful.

[@fukanefecalskans6971]

Hello from Turkey, I really like the pace and the very clear explanations. I feel safer when I watch you. Thanks a lot.

[@ResearchByDesign]

Thanks and welcome...it is gratifying to hear that. Stats can be intimidating. I try to take some time, slow down, explain it clearly, so that everyone can learn. Wish you the best.

[@israelbombasi7754]

This is very useful in so many ways. I'm a PhD student. and very much interested to learn more about SPSS for my assignments and researches in the future. Thank you so much Dr. Daniel God Bless You.

[@ResearchByDesign]

Glad it was helpful! Hope that you can find many others on the channel. Cheers!

[@juanfel1555]

NO WAY! I've just realised you are THE Todd Daniel from the history of psychology podcast!! I listened to those chapters like 6-7 years ago at the time I was learning English and getting interested in studying psychology! I am now in the middle of my master's dissertation at the university of Leuven in Belgium, and I randomly came across these videos! I kept having the feeling that I'd heard that voice before while watching, what I consider to be the best tutorial about stats and spss on the internet! I'm glad you're still producing excellent content that inspire a lot of people! Keep up the good work!

[@ResearchByDesign]

Yes, indeed...'tis I. I still love those podcasts and, you're right, they are very popular with people who are learning English. I guess it is that "Midwest accent." You remind me that I need to do some videos on YT promoting the podcast and maybe make a short podcast promoting the stats videos. So glad that you are still listening/watching. Best of luck with the dissertation.

[@juanfel1555]

haha yeah, I will also spread the word about these amazing productions. I was wondering if you guys are also planning on doing the same kind of tutorials clearly explaining how to use the software and the tests, but with R, given that you're called the Rstatsinstitute? have a good day!

[@ResearchByDesign]

Tutorials with R is certainly a possibility. We have discussed doing it. I suspect it will happen in the future, but I have many more SPSS videos in production and I want to do a series on JASP. I may do a few R videos on my favorite packages for intro to stats.

[@juanfel1555]

That would be amazing, and I also predict very popular now that R is becoming so widespread even in social sciences.Thanks a lot!

[@VivianEBurns]

This video is very much descriptive and interesting to know that many methods and values consist of our daily living and being able to see the means and the standard table of it in a different language is awesome. Which, I want to thank the professor for showing me the pathway to do so.

[@ResearchByDesign]

Glad you enjoyed it! Check out the channel playlists for more in-depth videos on these topics. Cheers!

[@bldeacet-automobile-wedriv359]

Very clear and simple explanation. Thank you Dr. Daniel.

[@ResearchByDesign]

You are welcome!

[@shashilatayadav1119]

I really enjoyed watching your SPSS video... Simple language ...very clear... U stressed on important points... So beautifully explained... Excellent

[@kofimawuli8940]

Great teacher by all standards. Good work.

[@dr.lasagne3384]

You legit are saving my statistics grade, THANK YOU SO MUCH

[@georgemartim6582]

you are marking us great statician!

[@monicaselesmuwaya9815]

You have made me become a good statistician I never thought I could be

[@ResearchByDesign]

Such a wonderful comment. So glad that the videos have been helpful.

[@ILoveCookiePie]

I am learning more than from my Master's programs. Thank you.

[@ResearchByDesign]

Great comment. Thank you so much. Wish you the best with your masters program.

[@deedagbaloch3411]

Sir i am very thankful for your this positive efforts. i belong from pakistan here we dont have institute which build up skills in us. i learnt a lot about SPSS now i am proudly to say i know SPSS which i learnt by you

[@ResearchByDesign]

So honored to know that I can help you learn SPSS from so far away. That is what professors live for...education beyond the classroom. Thanks!

[@erzanamaliqi102]

Bestie i literally owe you my diploma, thank you for the videos, love u G!

[@ResearchByDesign]

You're so welcome! Glad to help play a part in your education. You got this...good luck!

[@souravmondal1838]

Learned the most hardiest things in most simplest way from you, Thanks a lot Sir...... 🙏

[@ResearchByDesign]

All the best. My pleasure.

[@sarahpotts3253]

Loving these videos! So clear and easy to follow. Thank you

[@AbnansNGfashionacademy]

Thank you Dr. spss explained in the simplest form

[@michellec172]

I missed my stats class for a family emergency when they did the spss lab and was feeling completely lost...so glad I found these to quickly catch up! Thank you!

[@ResearchByDesign]

Excellent...I am so glad that I can help your education. That was the whole reason for making this series. Wish you the best.

[@MohammadAllibaih]

I have enjoyed every single step of your video, spending less time in learning and getting much of knowledge. I appreciate your great help. Many thanks!!!!!!!!!!

[@fihan565]

This video give me life since i can hv an idea before lab this evening. Huhu learning during pandemic has been ease a bit with this. Thank you

[@ResearchByDesign]

Wonderful! Wish you the best with your studies

[@solomongaiayuengainsibling939]

I have enjoyed learned more in single of your video, spending less time in learning and getting much better of knowledge. I really appreciate your great help. Thanks So much

[@mihbrandonedeng5306]

Thank you very much Dr. Todd Daniel. Am really learning alot from the series of your videos "SPSS for beginners" Lessons to lesson follow up is helping me gain alot in data analysis using S 🌍🌍

[@eman3754]

Thank you so much for the video. Helped me understand SPSS way better than I did in the class. Have a good feeling about the exams now. :)

[@govindshenoy7693]

Sir. could you please explain how to do Pearson correlation for 2 variables with seven items in the questionnaire for each of this variable

[@ResearchByDesign]

You are going to need to combine items to create scales. You CAN do correlation with every item, but I do not recommend it. Instead, combine (average) multiple items into related constructs, then correlate two constructs. Hope that helps

[@hannahlewis-m9t]

So if the difference is not significant does that make the null 65? And would you say you are retaining the null hypothesis?

[@ElanaLottner]

could you redo it with the updated software? I don't understand the numbers in the one-sided vs two-sided p. I mean shouldnt they be the same and only the number im comparing it to (the alpha) be different?

[@officialfatima2371]

Superb sir never heard such pleasant superb teaching

[@ResearchByDesign]

So nice of you. Thanks for the comment

[@myself047]

Thank You Sir..Such an elegant way to explain.

[@ireo7534]

I always look forward to the next Video. Excellent Teaching Sir!

[@ResearchByDesign]

Glad to hear that!

[@azizucc]

May God bless you and guide you onto the straight path

[@mockexam79]

Thank you for this vide. I want to ask how do we find the table for "critical value for the t distribution"? I hope to get response. Thank you

[@joeysanangelo483]

Great videos, I would like to know how to use spss from an NES data set. Any ideas

[@yasmijnwestenberg5181]

Great explanation. Also, you look like my king Willem Alexander

[@marshabaker6259]

Where does the T Table for critical values come from? Did I miss a video? Is this something I can calculate in excel? Thanks.

[@ResearchByDesign]

Try this one for an introduction: kzbin.info/www/bejne/oYnSloWMmb-VqZo. and this one for the how to: kzbin.info/www/bejne/p3y0YXuQlsdlapI

[@marshabaker6259]

@@ResearchByDesign Awesome. Thank you. You guys rock!

[@pagnakaze]

I can study these all day!!

[@ResearchByDesign]

Thanks for that comment! Hey, I just posted the first of a brand new series about SPSS 27. Hope that you can check it out: kzbin.info/www/bejne/nardhYpmba6Wm7c

[@johnnefercinense58]

I learned so much from this video. Thank you very much!

[@ResearchByDesign]

I'm so glad! Thank you for commenting.

[@asma87304]

Thank you for introducing SPSS and the terms in a way that's easy to understand! Much appreciated.

[@ResearchByDesign]

Glad it was helpful!

[@aj874]

Great explanation, THANKS!!!

[@ResearchByDesign]

Glad it was helpful!

[@Julie-lp8zz]

What if you don’t have a value for literature? What value can you place in there when running report ?

[@ResearchByDesign]

That comparison value should be chosen as either the mean of the population from which the sample was chosen, or sometimes the mean of a test (such as comparing to an average IQ of 100). It should be a meaningful, comparable value. If you don't have one of those, then your test will not be meaningful.

[@limszeching]

Hi Professor, I would like to inquire, when referring to the t distribution's table with df=9, why comparing the critical value from 2 tail test instead of 1 tail test?

[@ResearchByDesign]

You would use the 2-tail test when your hypothesis is that the groups differ, but you do not state whether the mean will be higher or lower. Also, there is no specific option to interpret a 1-tail test in SPSS. You have to use the 2-tail output and then interpret what the cutoff score would be for a one-tail test. Hope that helps.

[@rachelmichelle6769]

You are an excellent teacher!

[@ResearchByDesign]

Thank you! 😃

[@Marskocoro]

All that I learned now makes sense. Thanks!

[@allycarlsten8440]

Where it is suppose to say sig (2 sided) mine says one sided p and two sided p. Does anyone know how to fix this?

[@Jeffreviews4u]

What test would I use for a 1 way t- test? I want to compare a portion of my population to the entire population

[@AqleemAbbas]

Thank you for uploading such a great lecture on t-test.

[@utubemania9079]

In love with your videos.

[@javiersolarirazabal7089]

This is better than college :)

[@ResearchByDesign]

Ah, but there are so many things that are better than college... :o) Thanks for the comment. Glad that they are useful for you.

[@AnuragKumar12307]

It's showing one sided p and two sided p in the output, I want to show p value . What to do ?

[@ariel1227]

Thank you so much for generously sharing your knowledge and skill, Dr. Daniel. I have a question that will be even more grateful if it can be answered. May I know how to decide which critical value to adopt when referring to the Student-t table? How do I know whether the test is one-tailed or two-tailed and the alpha is equal to 0.05 or 0.01?

[@mariecarmelleourlaineconst4474]

thank you. This is excellent direct to the point teaching.

[@mohammadsangary9756]

Hello Sir, I really need your help 1. I have four groups in my experiment (one control and three experimental), I feed to control group the normal diet and to experimental groups normal diet plus different percentage of same supplement. Now I don't know how to calculate p-value of different groups (if adding supplement significantly affect the three experimental groups compare to control group or not). I have mean of live body weight of them from 12 days along the experiment (from begging till the end of the trial). 2. I have different mortality rates (%) in control and experimental groups, how to find if the mortality rate in experimental groups is significant or not compare to control group? thanks in advance Mohammad from Kabul Afghanistan

[@ResearchByDesign]

You should use a one-way ANOVA with four levels. Assuming that your samples/groups are each the same size, use a Tukey post hoc test if the F test is significant. It will help you see which groups differ. You can use weight as the DV. For % mortality, you can use a proportions test with a Bonferoni correction (set p = .0125 for 4 groups as your criteria for significance between groups). Hope that helps

[@ResearchByDesign]

One more thing...if all you want to do is compare each group to control, you ca use planned contrasts to control the p value error rate, instead. For the DV, I'd suggest using the beginning and ending weights, but that would change your design to a mixed ANOVA (instead of one-way). Wonderful to talk to someone from Kabul...wish you the very best for you and your country.

[@mohammadsangary9756]

@@ResearchByDesign Thank you so much dear professor

[@mrtosajloterulio6898]

I’m confused, you used the 2.262 critical value from the two-tailed column instead of the one-tailed one. You are explaining for the one sample t-test (one tailed t-test) I figured that anyway, in the end the result is not significant due to the confidence interval not being 0 nor having our t value exceed the one tailed critical value of 1.8. The significance value also surpasses the alpha level. Could you(or anyone) point this out to confirm my confusion and offer some clarity? Thanks! The videos you provide are good! I appreciate it!

[@ResearchByDesign]

The test is a one SAMPLE test (comparing a single sample to a known population value), but we are using a two-TAIL variety of the test because we want to know if the sample mean is "different" than the known value. We would use a one-TAIL, one SAMPLE t test if we compare a single sample and ask if the sample mean is "higher" than the population value. So the one sample refers to our research design and the one/two tail refers to our research question. Hope that helps.

[@yadgarhamakhan]

Hi, Many thanks for your videos, I was wondering if you could let me know that how I can make total score when 4 variable are the same, I mean 4 them likert 1 to 5 but the fifth variable is multiple answers 1 to 11, then how can I compute those variables? Please

[@stefkyria]

seriously, thank you!

[@TaraGhimite]

Thank you Dr Daniel

[@ResearchByDesign]

You are ver welcome, thanks for watching

[@07sapnamahi27]

Very very very well explained thanks a lot

[@ResearchByDesign]

You are most welcome

[@fezalikhan]

professor, could you explain more what is test value in it, and how we can set it or know it??i m a bit confused abt it

[@ResearchByDesign]

I'm not clear on which value you are asking about, so let me link you to another video on this test. It will contain much more detail and perhaps answer your question: kzbin.info/www/bejne/i5KqfniGlriUfNE

[@shahadyagoub5143]

This is very helpful thank you sooo much 🧡🧡🧡

[@ResearchByDesign]

You're so welcome!

[@genevievegonzalez9002]

So your test value is like the bar you’d set to test your hypothesis. i was having such a hard time understanding until i watched this

[@ResearchByDesign]

Excellent! Glad to hear that it was helpful. That is a good way to conceptualize the explanation.

[@aronirain2011]

thank you! helpful in reminding me of what I used to use in conducting statistical calculations

[@ckarcher4504]

I think it is very difficult to understand that p-value in this lesson, why it is so large, especially when the sample mean close to the population mean?

[@ResearchByDesign]

Probability (p-value) is a function of effect size and sample size. As either of those get larger, the probability will grow smaller

[@samuelzinabudesta6806]

Best teacher!

[@attiafatima]

Best for beginners

[@esmatnajibi8564]

thank you very much , it was very helpful and easy to understand

[@kellcameron1967]

thank you so much for this video, it really helped

[@sallyatef134]

Great explanation... Thank you

[@ResearchByDesign]

You are welcome!

[@saraa4999]

Thank you. You are appreciated

[@astril1234]

Thank you so much!

[@bazezewchekol8931]

how can I get and install free and offline spss software on my pc please help me

[@ResearchByDesign]

There are no free versions of SPSS available but there are student versions available at a reduced price. I recommend OnTheHub, but there may be other websites. Once you download the software, you simply follow the installation instructions. You must have an academic email to get the student version, however (i.e. ending in .EDU). Good luck

[@supratimmitra9128]

Thank you for your videos

[@ResearchByDesign]

Glad you like them!

[@rajeshnigah7429]

awesome teaching..thanks a TON:)

[@AB1SKI]

Great videos!!! Kudos!

[@madznedz848]

Thank you so much for a great video!

[@nidhipatel5800]

He'll .. please help me I'm still unable to download spss in my pc so help as well suggest me to install nd which version i have to download please help me as soon as possible...

[@ResearchByDesign]

I wish that I had something more helpful for you. I recommend the current version (which may be the only version currently available), Version 26. For help with actual installation, I would refer you to support from the website where you downloaded it. Hope that you get it worked out!

[@AqleemAbbas]

Dear Sir, I usually confuse about the term: Statistically significant. What does it means? The treatments are significantly different from each other. These kind of sentences I have read in research papers. Why we need significantly different data?

[@ResearchByDesign]

Two videos: (1) what statistical significance means, (2) what statistical significance REALLY means . The first is basic, the second explains why it matters.

[@AqleemAbbas]

Thank You Sir

[@tolulopekayode-adedeji6652]

how do you copy your chart or scatterplot from spss to your document

[@ResearchByDesign]

The Export button in the Viewer/output window allows you to export the results. Here is a video about how to do it: kzbin.info/www/bejne/Y3-ac6aaoM13gpY

[@tayfunyurdadon3596]

Very helpful! Thanks!

[@jessajeanvelmonte1738]

How and where can we download the software?

[@techinfo89]

why do we calculate t_value

[@manospasal159]

your videos are superb.

[@alaals1254]

Thank you so much

[@nationalanimalnutritionres4309]

Thanks for this video

[@ResearchByDesign]

Most welcome

[@anisena16]

Thanks for the video, saved me. But whats with the camera angels? Its like a forensic files episode 😂

[@jannatulfatimakeya3563]

Thank you sooooooooo much.........

[@ResearchByDesign]

Most welcome 😊

[@riadsamir4397]

thanks a lot that was very helpful

[@ResearchByDesign]

Great...glad that you learned something !

[@shawsr7]

You Da Man!

[@taratehrani8019]

Thank you so much you saved me

[@ermeniaguterres4329]

I have learnt a lot from this video. Thank you Sir :)

[@jasbeerdhawan144]

Excellent

[@ResearchByDesign]

Thank you so much 😀

[@AhmedTarek-nj2be]

When should i use frequency? When should i use anova? When should i use descriptive ? When should i use correlation? When should i use independent test? I am sorry . I am very lost 😭😭😭😭😭😭. My professor is trash plz reply

[@ResearchByDesign]

Hey, you sound a little overwhelmed with stats. Let's keep it simple. First, stats is all about numbers. Sometimes we count things, or measure them, or just use numbers to label groups (Group1, Group 2, etc.). So when you count things, you use frequency. How many of each do you have? ANOVA and t tests are for when you measure something and you want to see if the measurement is different between 2 groups (indep. t test) or 3+ groups (ANOVA). You can also do repeated measures where you measure the same group twice (paired or RM t test) or 3+ times (RM ANOVA). Correlation is when you measure two things (temperature & sales) then you look for a relationship between them (do sales go up when it gets colder?). I have playlists for all of these, so please check those out and see if that helps walk you through your course. Wish you the best. You're going to get through this!

[@kellyjohnson8551]

Well, I wanted to show this to my students except you have a flaw in here - you talk about comparing people in the U.S. to people from another country. That would be an indep. t-test because the sample from the other country is not a subset of the American population. A single sample t-test would be comparing a sample (and its mean) to the population parameters (e.g., the population mean) that the sample is selected from.

[@ResearchByDesign]

That depends on two things: your research design and how you want to define your population. I was thinking of humanity being the population and using a mean established by a researcher from a study in another country (perhaps with a given diagnosis, job description, or other signifier) to see if similar people in America scored the same. You could compare an American sample to an established mean (or other known value) using the one-sample t test. You would need to have the sample data from both countries to do an independent t test, but you certainly could design a study in that way. Best to you and your students. Thanks for commenting.

[@sidrarafiq4323]

Very Nice

[@se7304]

Thanks

[@adlinaputra5243]

thank you sir

[@ResearchByDesign]

Most welcome

[@manorajpoot9813]

Sir plz hlp me I need your hlp