QUESTION 1

The wait times at the Welland General Hospital's emergency room are normally distributed. The mean wait time is 32.3 minutes with a standard deviation of 5.7 minutes. What is the probability that a person visiting the Welland emergency room would have to wait:

a) More than 40 minutes?

b) Between 25 and 35 minutes?

c) Between 20 and 30 minutes?

d) The quickest 5%, will have to wait less than how many minutes? (Round to 2 decimal places.)

QUESTION 2

The weights of newborns are normally distributed. The standard deviation of their weights is 0.37 kg. If 10% of all babies weigh more than 3.98 kg, what is the mean weight of newborns? (Round your final answer to 2 decimal places.

QUESTION 3

A pizza company will give you a free pizza if it takes more than 35 minutes to deliver your pizza after you place your order. The mean time to deliver a pizza is 28.5 minutes. If the company has to give a free pizza 3% of the time, what is the standard deviation? (Round your final answer to 3 decimal places.)