Anormal population has a mean of 35 and a standard deviation of 8. a. what proportion of the population is between 20 and 30? b. what is the probability that a randomly chosen value will be between 30 and 40? solve in r

a. The proportion of the population is between 20 and 30 =0.2356

b. The  probability that a randomly chosen value will be between 30 and 40 =0.4680

Step-by-step explanation:

Given : Mean :

Standard deviation :

The formula to calculate z-score :-

For x= 20

For x= 30

For x= 40

a.

b.

step-by-step explanation:

sorry i just need to anwers this to get points

step-by-step explanation: