normalpdf, normalcdf, and invnorm

The three TI83/84 features dealing with normal distributions and how they are (or could be) used.

[@raqad4642]

Thank you so much sir your explanation is incredible and I am really appreciative of that

[@leticiamatsubara7298]

You just made my life soooooo much easier! Thanks

[@donnapodhurst6552]

Some will understand when all they are told is ''''use technology'''' it just does not cut it----- and a good explanation DOES. ---- T.Y. for the good explanation.

[@joan3024]

you saved me so much time thank you and God bless you!!!

[@freijawow]

thanks man. I was quickly in need of the difference between pdf and cdf

[@shfgafdksljfgna]

Thanks, man. Helpful recap.

[@Rad631]

Excellent video, thank you

[@princee7991]

Very nicely informed! Well done !

[@qwe1996825]

thank you so much!!! it really helps a lot

[@chicken_stewer5432]

This will be very helpful! Thanks a lot

[@Newel681]

thank you so much for this video

[@mathteacher4140]

well done! very clear, and easy.

[@Lglandorf6]

So helpful!

[@andrevdm2740]

Thank you 🎉🎉

[@Sim-dm4kr]

Actually, normalpdf finds the percentile for a particular z-score. Basically, it finds the area made to the left. It doesn't give the height, it gives area.

[@MrDaveblev]

normalCdf gives the AREA between given z scores. normalPdf gives the height in a corresponding normal probability density function, which is what the pdf stands for.

[@Sim-dm4kr]

Oh wait, I get it now.

[@KS622]

Why en when would you use normalpdf?

[@MrDaveblev]

As mention at about 7:49 in the video, it isn’t used for anything more than precise graphing. I guess, by the fundamental theorem of calculus, it could be used as a rate of change in probability accumulating, but that isn’t really practical either, that I am familiar with.

[@KS622]

@@MrDaveblev Thanks!

[@maryanna133]

Cute accent