A sample of 61 items provided a sample mean of 932, a sample mode of 900, and a sample standard deviation of 11 . Test the following hypotheses using ? = .05 . What is your conclusion? H0: ?2 ? 80 Ha: ?2 > 80


?2 = 90.75 > 79.082 (p-value is between .005 and .01); reject H0
The population variance is more than 80.

Business

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