QUESTION 1

A study conducted by a large hotel chain showed that the mean time to clean a hotel room is 21.4 minutes. The same study also showed that 3% of rooms take longer than 26.6 minutes to clean. Based on this information, what is the standard deviation in minutes to clean a hotel room? (Round your answer to three decimal places)

QUESTION 2

The current annual salaries of entry level marketing positions in Canada is normally distributed. It has a mean of $51,500 and a standard deviation of $6,700. If we randomly select an entry level marketing position, what is the probability that:

a) The salary falls between $45,000 and $65,000?

b) The salary is less than $40,000?

c) The salary falls between $60,000 and $70,000?

d) The highest 10% of salaries will be greater than what amount?