The PricewaterhouseCoopers Human Capital Index Report indicated that the average cost for an American company to fill a job vacancy during the study period was $3,270. Sample data similar to that used in the study are in a file entitled Hired.

a. Produce a relative frequency histogram for these data. Does it seem plausible the data were sampled from a normally distributed population?

b. Calculate the mean and standard deviation of the cost of filling a job vacancy.

c. Determine the probability that the cost of filling a job vacancy would be between $2,000 and $3,000.

d. Given that the cost of filling a job vacancy was between $2,000 and $3,000, determine the probability that the cost would be more than

$2,500.