Mean, Variance, and Standard Deviation of Discrete Random Variable-TI-84

Use the TI-84 to find the mean, variance and standard deviation of a discrete random variable.
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[@gerigarcia4464]

I have been trying to figure this out for longer than I'd like to admit. Thank you for this, you just saved me from an immense amount of frustration lol

[@MathandStatsHelp]

I'm glad the video helped you

[@piperdecrescenzo]

the amount of information you have taught me in this video compared to a whole semester of prob and stat is astronomical truly. thank you

[@MathandStatsHelp]

Glad you found it helpful!

[@peachfuzz222]

I want to actually hug you, this was so helpful! I have a TI-83 Plus so I was incredibly confused with my textbook's description of how to solve this on the calculator, but now I understand it was telling me how to solve on a TI-84 (but still with a fraction of the detail in which you explained it). THANK YOU :)

[@MathandStatsHelp]

Glad you found it helpful!

[@JoeMama-zh4bk]

its not that serious bro

[@jaxenmorphis1537]

Thanks! Great for checking my work to make sure I did the calculations correctly. :D

[@dizzytheday5586]

7:24 to see how to do this on a TI-83. Thank you.

[@shawneenorman8533]

Super helpful in these times of online learning. thanks so much!!!!

[@user-fd2gh7gv5m]

Thank you! You made it so clear, I finally understand what I am doing.

[@chineduejeh8948]

Amazing Video! Thank you for the help.

[@nickabstract6774]

THANK YOU every other video i found didn’t show how to do it on the calculator

[@sooome9294]

I have the older TI 84 Plus Silver version and it really helped you explaining how to get to L1,L2, I have notes that I cannot find. Thank you, well explained, was able to write good notes.

[@codewl]

Thank you so much. You clip is extremely helpful since I did not know what to do next with the frequency list; I am using TI-84 plus, which presents a different list from TI-83 when it comes to CALC.

[@MathandStatsHelp]

I'm happy to hear it helped you.

[@codewl]

^.^

[@poopoopotamus]

You're really great at teaching! Thank you so much!!! wish you were my professor

[@MathandStatsHelp]

Thank you. I have a lot of content, so hopefully it can help you through your course!

[@kaylinanderson9678]

Thank you so much for this video

[@amornzenitram6137]

THANKYOU still I am confused but at a better understanding!

[@lebrinrajanlevi]

Wow, I am not a Math person, but need Stats for my degree, and I had no idea how to find this on the calculator. You are great help.

[@MathandStatsHelp]

I have all of my videos nicely organized on my website. It's free to use: mathandstatshelp.com/statistics/

[@lebrinrajanlevi]

@@MathandStatsHelp Thank you so much :)

[@b1ggaming618]

THANK YOU SO MUCH YOU ROCK

[@rohanchung2185]

Thanks so much. Very clear tutorial and explanation. God's continued blessings Maths and Stats Help.

[@MathandStatsHelp]

You're welcome. Glad it helped

[@desireemiddleton]

Lifesaver. Thank you!!

[@MathandStatsHelp]

You're welcome!

[@jesustakethewheel8846]

You really helped thank you 😗

[@temishabaker2404]

Thank you. All the other videos were on the basic TI 84 and skipped the step of enter into the FreqList! I had trouble finding your video, because it does not say TI-84 Plus

[@MathandStatsHelp]

Thanks for letting me know. I will go and add TI-84 plus. They are basically the same calculator. Glad this helped you.

[@temishabaker2404]

No problem. The steps are just a bit different on the TI-84 Plus. Without it, I was stuck. Thanks again!!

[@Byokku2013]

you the bomb! very helpful!

[@MathandStatsHelp]

Thank you! Glad to hear it was helpful for you!

[@iPurrifyy]

For a distribution table bigger than 2 list, would you have to use 2-Var stat on your calculator & put in the frequency list the other columns of #s?

[@MathandStatsHelp]

2-var stats is used when you are comparing two different variables. Sometimes textbooks can't fit all of the information into one column, so without seeing the problem, it's hard to say.

[@iPurrifyy]

Math and Stats Help so like if there’s an x & y variables and an f(x) & f(y) you use 2-Var stats ?

[@MathandStatsHelp]

Yes, more likely in statistics instead of being listed in the problem as x and y, it might be listed as heights of males in the US and heights of males in Kenya. That would be two variables that you are comparing to see if there is a difference.

[@iPurrifyy]

Math and Stats Help ok perfect. Just making sure cuz some of the problems in my book/hw had x&y variables & f(x) & f(y). One of the problems they gave us x & f(x) but we had to find Y & f(y) and it was somewhat confusing

[@Dakilangmanok]

Does it matter if the Ti84 converts a number in your list to scientific notation before you get the final answer?

[@MathandStatsHelp]

No, it's fine

[@sabeeharozi7139]

I have a question regarding the problem you solved. As I got everything right as I follow you but I am confused when we did on calculator why n(numbers are not shown 5) it shows n=1. For each question I got n=1 whatever the question data is. Why it always show n=1?

[@MathandStatsHelp]

n is the sum of the frequencies. In this case, because it's a probability distribution, the sum of the frequencies is always 1, because that is one of the requirements of a probability distribution the sum of the probabilities has to be 1.

[@greshmm8753]

I hope you see this.. Whenever I put in the numbers, same way, same lists, it come up with an error saying “Must be an integer” for the second list.

[@MathandStatsHelp]

I've never seen that error message. You may want to try to clear your memory. Hit 2nd,+ 7 1 2 After resetting the memory, try again.

[@platinimarcelin3699]

Finally

[@rh0daaa]

my population is over 1, is that ok?

[@MathandStatsHelp]

If it's a probability distribution, the sum of the probabilities has to equal 1.