1

So I was preparing for an entrance test and the study material provided by the institution has a lot of mistakes .Please forgive me if this seems off topic.

I just know high school maths and I am studying Normal Distributions for the first time and I want to ensure whether there is a misprint in the book for this fact in the image(in red box).

enter image description here

For all I know this is a contradiction simply due to misprint.Am I right or wrong.And if wrong,why?

P.S.:Also any other online resource to learn normal distributions would be helpful if anyone knows one.

Ishan Taneja
  • 253
  • 14.26 is correct and 14.31 is indeed a misprint. – drhab Jun 08 '16 at 11:44
  • @drhab Thanks a lot! – Ishan Taneja Jun 08 '16 at 12:07
  • Do you mean $z\sim\frac{x-\mu}{\sigma}$? – robjohn Jun 08 '16 at 14:14
  • @robjohn I did not understand what you mean.I thought there was a mistake in the book that is shown in red boxes.The other things I already have understood. – Ishan Taneja Jun 08 '16 at 14:44
  • That was answered by drhab, but I was just looking at your formula that says $z=x-\mu/\sigma$, which looks wrong, also. It could have been a typo in the book, or a typo in your MathJax. – robjohn Jun 08 '16 at 15:11
  • @robjohn You mean it looks like that $\sigma$ is just below $\mu$ only.Well that is given correct on the succeeding page and also by the way that is an image from the book ,I did not use MathJax for that. – Ishan Taneja Jun 08 '16 at 19:50
  • Doh! It is an image. That answers my question; it is a typo in the book. – robjohn Jun 09 '16 at 06:33

0 Answers0