Question

Sale amounts during lunch hour at a local subway are normally distributed, with a mean $ 8.21, and a standard deviation of $ 1.26.

a. Find the probability that a randomly selected sale was at least $ 12.74?


b. A particular sale was $ 5.86. What is the percentile rank for this sale amount?


c. Give the sale amount that is the cutoff for the highest 95 %?


d.What is the probability that a randomly selected sale is between $5.00 and $9.00?


e. What sale amount represents the cutoff for the middle 36 percent of sales? ( The smaller number here) (Bigger number here)

Answer 1