07 Independent Samples t-Tests in SPSS - SPSS for Beginners

[@paradoxum5275]

An instructor here, I used these videos as a learning resource to help compliment their learning process. It is really helpful to have a summarized content of all the discussions we had on the topic. Thank you!

[@Eva28A]

You sir are my savior. I have an exam on stat theory and SPSS coming up and I can't tell you how much your videos have helped me!

[@MallikaVenkatramani]

I'm working on my graduate thesis right now and need SPSS for analysis. This has been incredibly helpful. Thank you!

[@WeAreUX]

Seriously stil loving your channel. You helped me pass my statistics exam back in 2020 and now again during my thesis! Cheers From the Netherlands.

[@LambTikka]

这才是一个不讲废话，不罗里吧嗦，直击主题，绝世好老师

[@thebigbadsam1]

This is a lifesaver. My grad teacher doesn't even bother teaching us how to use spss or even the class for that matter. Thank you for this.

[@ResearchByDesign]

So glad that the videos are helpful. I created my original videos so I could teach a class with them, so maybe that can help you along, too. Wish you the best learning in stats

[@iramana8710]

This helped me too because of that reason too ! Thanks for the easy explanation

[@alikarimi1987]

you are a miracle to whoever likes statistics Dr. Daniel

[@ResearchByDesign]

Thank you so much for the comment!

[@sabamahnoor8692]

After six years ,you are still helpful sir.. tomorrow i have a practical and i want to do my best....thanks for sharing 😊

[@gurrianaheed5786]

he made these concepts really clear for a beginner. respect

[@ahsanqureshi3467]

Your contribution to my understanding of SPSS, somebody with NO stats background. Thanks

[@ResearchByDesign]

Glad to hear that! Wish you the best with your studies.

[@AlexandraFox12]

Simply great videos, so easy to grasp! I'm doing methods course in Educational Research and these short videos have finally freed me from the state of confusion I've been in during the lectures at university. Very helpful and I realized I really like working in SPSS!

[@elizabethpollock640]

Amazing! I'm working on my EdD in leadership, but needed to take a beginning statistics course because it's been more than six years since I took statistics. How in the world can I understand advanced statistics if i don't know the basics? These videos have been incredibly helpful. Thank you for your methodical knowledge, concise discourse, and true professionalism in a subject matter that can be quite daunting!

[@ashokgohain1814]

I am watching this video now, and really it's so simple and so much informative and easy

[@aliyuhashim8360]

easy and accurate way of teaching and now i understand after watching many video of others before this video...... thank you so much.

[@Sayeef_Khan]

One of the most easy to understand video. Hats off teacher!!

[@hasanulgonisohayeb6323]

This is the best source to learn Statistics.

[@ResearchByDesign]

Thank you so much for the comment. Glad that you are enjoying the videos!

[@baronzeegmot3801]

2000 word Biosciences report due tomorrow, thank you for this video it helped SO MUCH!!!😀😀

[@stonywings5888]

I can't tell if you should be a professor or a door salesman. You would be well suited for both! :p

[@hudagubara5492]

You just saved my graduation project, thank you.

[@ResearchByDesign]

Glad I could help! That is wonderful to hear!

[@ninagonzalez12]

Thank you so much for helping me understand how to use SPSS and interpret the output. SO HELPFUL.

[@ResearchByDesign]

I'm so glad!

[@ayeshamoiz4086]

Absolutely excellent videos. I'm learning SPSS & your videos really help me out to understand all statistical stuff. Thumbs up👍👍

[@ResearchByDesign]

Thank you so much for the comment. Glad that the videos are helpful!

[@rahuljay5011]

thank you sir big respect to you!!!! your explanation is way better than my college professors

[@sharaniasharania6646]

The best thus far. way better than my lecturer. can u take over his place? lollol. He taught and half of the class couldn't understand. We are gonna sit for an exam and you did an amazing job by helping me to get this on my head. Thanks, Dr.

[@ResearchByDesign]

Glad that the videos were helpful. Please recommend them to your classmates, as well. Best of luck in your class and don't be too hard on your instructor...we all have to learn somewhere and teaching is not as easy as it may seem. Cheers!

[@sharaniasharania6646]

@@ResearchByDesign I wish we could take easy on our lecturer... theres a difference between a passionate lecturer and "I dont care, but just feeling in the quota coz I have a privilege" lecturer.... whenever we asks, He says "Ask your friends" and speaks the native language when the others dont understand. Lol.... Too scared to even complain🤷‍♀️, scared that our marks will be jeopardized and they whole system turn against us. Anyway thank you

[@spspspspspspspspspsp]

Thank you for explaining this slowly and clearly. My lecturers explanation was hopelessly convoluted compared to this video. You saved me o.o

[@ResearchByDesign]

Glad it was helpful!

[@tinreisch]

After a million replays I finally understand, thank you :>

[@sanjaseljan1405]

Absolutely excellent: clear, logical, understandable, interesting!

[@salonipatankar8924]

oh my god THANK YOU SO MUCH. Was SO confused about my dissertation and your video made me understand the test so well! thank you!!

[@ResearchByDesign]

You're very welcome! That is great to hear

[@estellavaio]

this is a life saver, i've watched the first video up to this and everything was so easy to grasp.

[@mehtabbabar1832]

Really admirable way 2 teach Love 2 learn SPSS

[@ResearchByDesign]

Excellent...glad that the videos are helping you learn. Thanks for the comment.

[@teddiezahra]

really easy to understand...never gets boring

[@berglindsvansdottir6407]

Absolutely great explanation, very understandable and helpful! Thank you!

[@aevonshrestha8322]

Wonderful video i have learned clearly to analyze the data on SPSS, thank you so much and keep going sir.

[@ResearchByDesign]

You're most welcome. Wish you the best in your class

[@thegeeentomato3116]

Thanks for posting this! It helped me a lot with my assignment and refreshing my SPSS knowledge

[@ResearchByDesign]

Great to hear! Thanks for the comment

[@nicolestevenson3404]

THANK YOU!!! I had been so lost, until today!

[@ResearchByDesign]

Glad I could help!

[@PetrilloCinema]

This is beautifully clear! Thank you very much.

[@zain-ul-abidin7811]

He makes it all so simple!

[@ResearchByDesign]

Well, I try to make it simpler...there is still a lot to know. Good luck to you. :o)

[@vincentjohnson435]

your explanations have valid reasons.....

[@ResearchByDesign]

Thanks so much!

[@shumyedemissie6610]

Absolutely excellent: clear, logical, understandable, interesting! God bless u!!!!!!

[@ResearchByDesign]

Thank you Kindly! Glad they were helpful

[@abbyroselli1859]

Just stumbled upon these videos. Thank you for sharing this information. Extremely helpful!!

[@ResearchByDesign]

Glad it was helpful! Hope that you find other videos on the channel that are useful, as well.

[@livinglife_hd5490]

spss made easy.. very interesting and easy lectures.. This one was very helpful.. !!

[@yosepundung6297]

Thanks Doc.... so much enlightening, I enjoyed all your SPSS videos.....

[@sukarhussein8106]

Thank you very much from Somalia

[@patriciawambui671]

Thank you for the videos. They were very informative and also easy to understand

[@ResearchByDesign]

Glad you like them! Thanks for the comment

[@angelouamoreaballe8230]

What type of test should I use when I need to compare the susceptibility of the test organisms to the fungal isolates in my study?

[@atousarezaei3054]

Do you have any idea how Amazing is your teaching?!!!!

[@ResearchByDesign]

What a wonderful comment...I am touched, thank you so much. Wonderful to hear that.

[@liezlsurel5961]

Thank you very much for this video very informative and easy to follow.

[@negusuworku2375]

Thank you Sir. It is Very helpful. Keep it up.

[@utkarshkunwar4319]

Hello Professor! Thank you for providing such easy to grasp content on both statistics and SPSS! There's one little doubt I had in this particular lecture and that being how come do we have df (degrees of freedom) 8 here instead of 9? Since we do not have "height" and "weight" data for two respondents, that leaves us with 10 complete pairs, and as told before, df in this case should be 10 - 1 = 9. Or is it because we independently calculated the df here, like 5 pair of data points for Men (so df = 4), and 5 pair of data points for women (df = 4) ?

[@marjean94]

I just can't figure this out if you have more than like 2 variables...my assignment has like 8 that we're supposed to run a t test with and I can't get it to run.

[@jjm1709]

Can we use this test for compare same grouping variable( nominal) with 4 test variables ( scale) at the same time?

[@nayakarpita]

if in confidence interval both lower and upper value comes to be negative then will it include zero?

[@amnayasin3166]

Can u please suggest how to compare age groups between two groups in SPSS ( for example Consumers and non consumers)???

[@pavanisiricilla8707]

Hello sir@research by design How you took critical value

[@dr.khaleequzzamankhan593]

Excellent lecture. Thank you very much for the explanation.

[@ResearchByDesign]

Thank you so much!

[@myself047]

Fantastic Tutorial....Thank You Sir

[@YasminKhan-vj1yc]

Amazing tutorial! this is a real time refresher for me, thank you So much

[@ResearchByDesign]

Great to hear!

[@Nbvcljkjgcg]

Thank you so much for sharing prof. it was very helpful.

[@waititstiiina]

Say I'm doing research on the correlation between study time and academic achievement. And I am using three different classes and the time used to study each of those classes. What kind of t-test would I have to use?

[@taladiv3415]

1:44, "let's get crazy" :D

[@MyDy08]

Accurate and precise. This help me a lot in my report.

[@ResearchByDesign]

Excellent...glad to hear it. Thank you so much for taking the time to comment.

[@marvins1373]

What if the results for the 3 ways of statistical significance condradict? So for example just one says significant and the other two not significant

[@Junie0911]

thank you for this great video. Would you mind help me with this question regarding the Independent samples t-test which has driven me nuts recently? Let's say I want to compare the income (IC) between male and female; and the component "income" consists of various types of income (IC1, IC2, IC3). Is it possible to compare IC with cumulated means of IC1, IC2 and IC3 (using independent t-test)? The video only mentions how to compare means of each items. Thank you very much.

[@ResearchByDesign]

Yes, absolutely. Create a sub scale by getting the mean of IC1 to IC3, then using that single mean as the DV in your t test. Alternatively, you can do a mixed ANOVA where you consider each IC variable separately for both categories of gender. Good luck

[@Junie0911]

@@ResearchByDesign that answers my question. Thank you very much.

[@physicaltherapyhome5661]

normality test for paired samples, many colleges place pretest and posttest values and giving to sign values while others place differences between pretest and posttest giving one sign value, what is the true???

[@monitoringandevaluationtitbits]

Thanks for the vivid explanation.

[@ResearchByDesign]

My pleasure! Thank you for taking the time to comment

[@ehteshamali2893]

Thank you so much sir for explaining. You're the best. :)

[@Colorful.Potatoes]

How can you determine the mean difference between your two groups

[@dailydosetv7187]

Thanks Prof, your videos really helped me here in Kenya, where there are few such cool instructors... Where can I get the Rstat institute videos that give everything in detail?

[@ResearchByDesign]

I think that if you go to the main channel (now "Research by Design"), you will find playlists and videos specific to every part of an introductory statistics course. Thanks for the question. kzbin.info

[@dailydosetv7187]

@@ResearchByDesign thanks for the clarification

[@suvarnasasidharapanicker1430]

Easy to understand. Thank you so much.

[@artimalik1126]

Sir, where can I find your videos on effect size

[@hassansaziz]

Great contribution, i love it. it gives me clear understanding..... Thank you very much.

[@check7737]

Thank you. This is really helpful

[@ResearchByDesign]

Glad that it was helpful!

[@jahidhasanashik934]

you have my respect

[@ResearchByDesign]

Thank you!

[@tesfayedegefawolde5496]

It made me to know easily SPSS Thank you

[@chiaradadamo7050]

Hi! Thank you for your amazingly helpful videos. I have a question. Can the independent t-test be run with one-tailed p value? If yes, how? If not, why? Thank you so much!

[@ResearchByDesign]

Yes you can! Here is a video about a one-sample t test. The technique is the same: kzbin.info/www/bejne/i5KqfniGlriUfNE

[@chiaradadamo7050]

@@ResearchByDesign Thank you so much! Your videos are hugely helpful!. In your video, you change the CI from 95% to 90%. Would it still be okay if I kept mine to 95%?

[@SalmanKhan-iw5ef]

Hi, Dr Todd Daniel, i loved your videos & learned almost everything. Where can i find your other videos on regression, anova and other tests as well

[@ezegeorgina1170]

A nice educative and simple video.....keep it going.

[@AqleemAbbas]

Superb and Interesting lectures on SPSS

[@aja6056]

You saved me! :D There is a special place for you in heaven :D

[@ResearchByDesign]

Thank you so much for the comment. Very pleased to know that the videos helped.

[@SimoneWilliams-pe7vp]

Just awesome!

[@kossonouprunelle7576]

Please Is it possible to use the t-test for only categorical variables ? Thanks.

[@ResearchByDesign]

If you have two categories variables (Gender and Voting status) you would use cross tabs (perhaps with chi square) to separate 2 x 2 for male/female vs. voted/did not vote; select row percentages option to get the frequencies. Good luck.

[@kossonouprunelle7576]

@@ResearchByDesign Thanks a lot

[@marissadaily]

Amazing. Thank you so much.

[@theruball]

Hi guys. Is there a video on how too recode variables for example I need too find out if the gender of male and female are meeting a combination of reccomemded Aerobic amd Muscle strengthen guidelines

[@ResearchByDesign]

I was sure I had a recoding video, but it seems not. Your best bet is the Transform > Recode into different variables command. You create an Output variable based on ranges of scores. You may be looking for the Transform > Create New Variable command if you want to combine two (or more) variables into one, such as you would do with a Crosstabulation

[@margherita4524]

these videos are so helpful!

[@ResearchByDesign]

Great...glad to hear it! Please keep watching.

[@jackiehuang5391]

Hi, Dr Todd, where to obtain the Student's Distribution Table for comparing t value?

[@ResearchByDesign]

There is an effect size calculator in the course Google Drive (see the link in the description). It has a t table. Let me see about posting a copy of the one that I refer to in the video, as well. Thanks for taking the time to comment.

[@Me050292]

This might sound weird but I love you...

[@ResearchByDesign]

We statisticians often evoke that kind of response from women...there is something about a guy who knows how to calculate t tests and use proper APA style. :o) Thanks for the comment...made me smile.

[@oumridahoune7878]

Thanks ,but how about levene's test for equality of variances

[@ResearchByDesign]

No problem...here you go: kzbin.info/www/bejne/ap7Odo2unN2AiKM

[@rashi_psy]

Wonderful presentation sir.

[@ResearchByDesign]

So nice of you. thank you

[@maheralsayed8195]

Awesome lecturer :) Thank you

[@edisonjaygarcia8167]

THANK YOU VERY MUCH

[@ABDULLAHMALIK]

Excellent elaboration

[@ResearchByDesign]

Many thanks

[@poojachhachhiya1574]

If sample size is 50-50 for 2 groups each and we want to measure 2 groups of male, their age, their education etc. then which test can be applied? Plz tell

[@ResearchByDesign]

Balanced samples are great. If age is numeric/scale, then you could use an independent samples t test. Education will be ordinal, so I would use a chi-square test for that. Your two groups are the IV, age or education is the DV. Good luck

[@Luciiffeerr]

I still don't get this. Think I'm to tired, but I was wondering, we are doing an analysis and the have the question we asked on SPSS and made variables out of them. So example: Did you experienced you intro at work as positiv? The answer they could choose from were ''a lot* little and so on. We remade the variable answers to '' negativ and positive''' in SPSS because the percentage of people who answered was low. Can we do. t-test on the negativ and positive variables or did I just not understand why we need to do a t-test? Im so tired of this right now haha

[@ResearchByDesign]

Well, it is always a more enjoyable experience to do stats when your brain is fresh. Trying to learn when you are tired is tough. That said, I am having a little trouble following your research design. I have a few other videos about setting up an independent t test that might help clarify what you need in order to do the test. Start with this one: kzbin.info/www/bejne/ZpuqoJ2Mrdd5rJI

[@AqleemAbbas]

Great Lecture

[@lparreguy]

great explanation. Thank you

[@adoringsuji]

4:41 why are you taking 8° of freedom?

[@ResearchByDesign]

There are 5 people in each group. The df is n1+n2 - 2...or 5 + 5 -2 = 8. This is for independent groups, for repeated measures, it would be number of groups -1. Hope that helps

[@adoringsuji]

@ResearchByDesign yes thank you!

[@nadeemalbadr]

Why did you take the df of 8 ? Your sample were 10 and df is likely 9

[@frenchmacaron9235]

THE BEST!! THANK YOU!

[@TheKristicool]

Great explanantion ,thanks

[@ZNMelowLeloNeka]

does it have to be for when the same sample was measured twice?

[@ResearchByDesign]

If you measure the same sample twice (i.e. before and after design) then you have a repeated measures (paired samples/within subjects) t-test. The independent t test is for two groups measured once.

[@eryn5826]

Where did you get the critical value from

[@ResearchByDesign]

The critical value comes from Student's t Table. You can search for one online, they are in most every stats book, I included one in the Effect Size Calculator for t-tests spreadsheet...see link to Google drive in the video description.

[@eryn5826]

@@ResearchByDesign Thank you so much!