Hello!!

Question

A survey indicates that for each trip to the supermarket, a shopper spends an average of 45 minutes with a standard deviation of 12 minutes in the store.the length is normally distributed and represented by variable x.
a.A find the probability that he will be in store for each interval of the time listed below
b.If 200 shoppers enter the store, how many shoppers will be in the store for each interval listed below:
between 24-54minutes
more than 39minutes

Answer 1

a. I cannot respond adequately, since the times are not listed.

b. Z = (x-μ)/SD

For the last question, Z = (39-45)/12 = -.5

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion from that Z score that lies above that point. Multiply by 200.

Use a similar method to answer the remainder of your questions.

I hope this helps.