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A study by the National Golf Foundation reports that the 6.2 million golfers over the age of 50 spent an average of $939 on golf during the previous year. Assuming a normal distribution with a standard deviation of $200m what is the probability that a randomly selected golfer in this age group will have spent:
a. more than $1539?
b. between $939 and $1339?
c. less than $1139?
d. between $539 and $1139?

For the normal distribution (In 1999, the average charge for tax preparation by H&R Block, Inc. was $84.57. Assuming a normal distribution and a standard deviation of σ = $10, what proportion of H&R Block's tax preparation fees were a. more than $84.57?, b. between $64.57 and $104.57?, c. between $74.57 and $94.57? d. more than $104.57. What tax preparation fee would have been exceeded by 90% of the tax preparation customers?

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