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Hypothesis Test: Average Teacher Salaries

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A researcher reports that the average salary of teachers is more than $50,000, A sample of 25 teachers has a mean annual salary of $51,000. At alpha=.05, test the hypothesis that teachers earn more than $50,000 a yr. The standard deviation of the sample of 25 teachers is $2,000. (be sure to show your graphic, hypothesis setup, identify the appropriate statistic (Z or t), find the critical value from the appropriate table, compute your test statistics, and state your decision.

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A researcher reports that the average salary of teachers is more than $50,000, A sample of 25 teachers has a mean annual salary of $51,000. At alpha=.05, test the hypothesis that teachers earn more than $50,000 a yr. The standard deviation of the sample of 25 teachers is $2,000. (be sure to show your graphic, hypothesis setup, identify the appropriate statistic (Z or t), find the critical value from the appropriate table, compute your test statistics, and ...

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