How to calculate standard deviation for Normal Distribution calculations using Gate Virtual Calculator?

Question

Ex. I want to calculate :

P(21.11<x<26.66) = P(.33<z<2)

                             = 0.4772 - 0.1293

                             = 0.3497

 

How to get 0.4772 and 0.1293?

Answer 1

The equation for standard deviation is sqrt([sample size][probability of success](1-[probability of success])). To discover the specimen estimate from the mean and achievement rate, you separate the mean by the achievement rate. I think my answer is helpful you I'm doing write my essay On the off chance that mean=10 and success=0.2, you do 10/0.2 to get your example size, or 50 for this situation. At that point you do sqrt(50*0.2*(1-0.2) to get around 2.83. There you go!