Variance and Standard Deviation with the TI-Nspire

Learn to use the TI-Nspire to find both the population and sample standard deviation and variance.
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[@qeid_esther3930]

That's so helpful!! Thank you so much for making a video to share that!

[@MathandStatsHelp]

Glad you found it helpful!

[@brittanynewton9925]

Very helpful, thank you!

[@goldenwater2916]

Thanks for this!!

[@707-e8k]

Thank you great help 🙌🏻

[@peterwilliams8551]

Very helpful - thank you

[@MathandStatsHelp]

You're welcome! Glad it helped.

[@ChrisSaenzM]

Hi,
How do we calculate with 4 columns of data? I can't find any videos on anything more than 2 columns.

[@MathandStatsHelp]

Chris Saenz , can you send me an example problem? I'm assuming you are doing Anova, which I don't currently have any videos, but if I have a reference point, I have some time to make one tomorrow. You can email me at [e-mail]

[@ChrisSaenzM]

Chris Saenz
3 hours ago
Hmm. Seems like the calculator would be able to handle it. I was able to get all the answers correct up to Std Dev (b.). When solving on the calculator Lists & Spreadsheets, I may have to enter all the data (all four columns) into one column (A) and calculate it that way I think.
This is a homework question from my Operations Management Course. (SQC) Statistical Quality Control X bar Chart.
A quality control manager at a manufacturing facility has taken four samples with four observations each of the diameter of a part.
Samples of Part Diameter in Inches
1 2 3 4
6.0 6.3 6.1 6.0
6.3 5.8 6.2 6.3
6.0 6.2 6.2 6.0
5.7 6.1 6.3 6.1
(a) Compute the mean of each sample. (Round answers to 3 decimal places, e.g. 15.250.)
Mean of sample 1:___
Mean of sample 2:___
Mean of sample 3:___
Mean of sample 4:___
(b) Compute an estimate of the mean and standard deviation of the sampling distribution. (Round answers to 4 decimal places, e.g. 15.2500.)
Mean:___
Standard deviation:__
(c) Develop control limits for 3 standard deviations of the product diameter. (Round answers to 2 decimal places, e.g. 15.25.)
CL:__
UCL :__
LCL:__

[@MathandStatsHelp]

Here is a link to the video showing how to do a similar problem: th-cam.com/video/Nxd5XMNb-aE/w-d-xo.html

[@frankmelton3685]

You mean "Add a Lists and Spreadsheet Screen" not data and statistics..

[@gtarules1]

Doesn't work with CX CAS. =\

[@MathandStatsHelp]

It should work. Which part is not working? I know the CAS has more options, but it should still have all of the same features.

[@EmmaT23]

@@MathandStatsHelp it does, I have a cx cas and it worked for me.

[@inadaizz]

unacceptable audio cracking.

[@MathandStatsHelp]

This was one of the first videos I created.... I will make another one, because I agree.... Thanks for pointing it out

[@inadaizz]

@@MathandStatsHelp Thanks! =]

[@MathandStatsHelp]

@inadaizz see if this sounds better th-cam.com/video/rNpcp8-DqyQ/w-d-xo.html

[@civl112]

@@MathandStatsHelp great video.