Question

From a survey of 25 people who just took entry-level positions in the area, you find...

From a survey of 25 people who just took entry-level positions in the area, you find the sample mean wage to be $9/hour, with an estimated population standard deviation of $3.25. If the population is approximately normally distributed, find a 95% confidence interval for the actual mean wage of entry-level positions.

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Answer #1

Given :

Therefore,

(from standard normal table)

Solution :

95% confidence level interval for the actual mean wage of entry level postions is

95% confidence level interval for the actual mean wage of entry level postions is (7.726,10.274)

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