Probabilities in a Normal Distribution - TI-84

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Learn how to find the probability of a random variable x occuring in a normally distributed data set. This video focuses on using the shortcut in the TI-84 family of graphing calculators.
If you want to view all of my videos in a nicely organized way, please visit mathandstatshe... . It is free for anyone to use. Please share with others you know who are struggling with math topics or statistics.
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Опубликовано:

15 окт 2024

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Комментарии : 43

@qwill1998 4 года назад

You are a Godsend. You are responsible for my 91% on my Chapter 3 test covering Normal Distributions! Thank you.

@MathandStatsHelp 4 года назад

Glad to hear it helped you!

@JoeMama-zh4bk 2 года назад

no one asked

@WLJonesMusic Год назад

You are making a difficult subject very manageable. I've never done well in a math class in my life and I currently have a 96.7 average. Long way to go but I'm still amazed. Your videos are a godsend for sure!

@kylapolee3839 3 года назад

Thank you for show us the written explanations as well. Thank you so much for putting the work in for these videos!!! I wish my professor was as good as you when it comes to explaining the math.

@MathandStatsHelp 3 года назад

I'm glad you find them helpful!

@susanford2937 3 года назад

Finally - someone who is showing what I should do when my calculator is slightly different. Also thanks for spoon feeding me how to get the correct "E" for Eulers entered. That was making me cray-cray. You saved me!

@MathandStatsHelp 3 года назад

Glad the video helped! I try to make it as easy to understand as possible!

@keepin2480 4 года назад

Awesome video, you took me from spending 3hrs on 2 questions to next to 10 mins to finish the assignment, all i can say is i wish you were my teacher...

@MathandStatsHelp 4 года назад

I'm glad that it helped you!

@منوعاتفيلومينا 3 года назад

@@MathandStatsHelp the same feeling I finished in 2 seconds after 4 hours

@Dude_its_Dan 2 года назад

My favorite RU-vidr for explaining statistic concepts.

@MathandStatsHelp 2 года назад

Thank you!

@helenallen4467 3 года назад

Excellent, clear video. I now look at your statistics videos first! Thank you.

@vadimmanevich3751 2 года назад

Thank you so much, it really helps. I always get confused on this topic.

@vadimmanevich3751 2 года назад

you can also type -999 and just 999 for the negative infinity and positive infinity

@anniellealvarez9188 2 года назад

Does anyone know how to do it, if it says greater than or equal to? I've been searching for days and people only explain the basics.

@MathandStatsHelp 2 года назад

You would do the same thing as greater than, because it's a continuous distribution and technically something like 1.00000001>1, and there would be a negligible difference in the areas above.

@juliabatrisyiaabdrazak9608 3 года назад

where to find apps or software for the calculator? mind share the link thankyou

@MathandStatsHelp 3 года назад

I got mine from Texas Instruments.

@richardbutoncatipayjr.5796 3 года назад

It possible to get the link of ur calculator u used ma'am . Or APK.. tnx..

@MathandStatsHelp 3 года назад

Just search for TI-84 computer software. Texas instruments sells it.

@kare917 10 месяцев назад

Thank you so much ❤

@منوعاتفيلومينا 3 года назад

Thanks that vedio made my day

@MathandStatsHelp 3 года назад

Glad to hear it helped!

@oliviagardner2469 4 года назад

THANK YOU SO MUCH!

@paulcostinett886 2 года назад

What are the steps to graph this using the TI-84?

@MathandStatsHelp 2 года назад

After entering the data in L1 and L2, hit 2nd y=, 1:StatPlot1, select the histogram, make sure x-list is L1 and Frequency List is L2, hit Zoom, I think it's 9:Stat, and the graph should show up..... I'm going off memory and don't have a calculator handy, so I think I covered everything.....

@layanjabr436 4 года назад

I'm stuck on something that is driving me nuts, please help me, The question says X follows N(503,1.6^2) and asks to find P(X>505) so I clicked 2ND > VARS > normalcdf > lower: 505 upper: e99 mean:503 std deviation: 1.6 then I clicked enter and I got a negative probability. Why am I getting a -ve probability ?

@MathandStatsHelp 4 года назад

Did you use the EE button by hitting 2nd , (comma button is above the 7) for the 1E99?

@layanjabr436 4 года назад

@@MathandStatsHelp no :( I used the e above the divide sign. I did 2nd then divide then I clicked on 9 twice

@MathandStatsHelp 4 года назад

That's what is causing the problem. The value is less than 505, so it gave the negative probability. That e is Euler's number.

@layanjabr436 4 года назад

@@MathandStatsHelp Oh, so to avoid that problem, should I just go with 9999 all the time or sth ?

@layanjabr436 4 года назад

or am I supposed to use the E above the 7 ?

@shondalenaevans5690 Год назад

I wish that the functions worked for me 😮‍💨

@MathandStatsHelp Год назад

Are you hitting the subtraction button instead of the negative? It will give an error for that.

@cansuyu19 4 года назад

I really wonder about the teacher.Could you show your face once only please?

@MathandStatsHelp 4 года назад

Sorry, I don't like being on camera. 🙂

@oscarstill909 3 года назад

@@MathandStatsHelp why is this??? Are you being anonymous to the public and the private eye of RU-vid™️©️®️❔❔❔

@oscarstill909 3 года назад

@@MathandStatsHelp if you can’t bear the brunt of being on a Camera you could AT LEAST show your face once and only on your FB, Instagram and linked in page.