Lunch break: In a recent survey of 600 working Americans ages 25-34, the average
ID: 3355599 • Letter: L
Question
Lunch break: In a recent survey of 600 working Americans ages 25-34, the average weekly amount spent on lunch as $45.32 with standard deviation $2.87. The weekly amounts are approximately bell-shaped. Part 1 Estimate the percentage of amounts that were less than $42.45. Round the answer to one decimal place Approximately 16 % of the amounts were less than $42.45. Part 2 out of 3 Estimate the percentage of amounts that were greater than $51.06. Round the answer to one decimal place. Approximately % of the amounts were greater than $51.06.Explanation / Answer
Percentage of amounts that were greater than $51.06
= P(X > 51.06)
= P(z > (51.06 - 45.32)/2.87)
= P(z > 2)
= 2.5%
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