Hypothesis testing question:
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In 2001, the U.S. department of Labor reported the average hourly earnings for U.S Production workers to be $14.32 per hour. A sample of 75 production workers during 2003 showed a sample mean of $14.68 per hour. Assuming the population standard deviation = $1.45, can we conclude that an increase occurred in the mean hourly earnings since 2001? Use a = .05. What is the p-value
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