According to the U.S. Labor Department, average weekly wages in February 2013 were $822. Assume weekly wages in the United States follow the normal distribution with a standard deviation of $190.

a. What is the probability that a randomly selected worker in the United States earned 1. less than $900 per week?

2. between $800 and $920 per week?

3. between $550 and $700 per week?

4. between $750 and $1,100 per week?

b. Confirm the answers to part a with Excel or PHStat.

c. What weekly wage will a person earn if he or she is in the 45th percentile?

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