You conduct a study of employee stress levels within your organization, finding these scores: 3.16, 2.12,...

You conduct a study of employee stress levels within your organization, finding these scores: 3.16, 2.12, 5.12, 3.21, 1.11, 4.32, 4.87, 3.79. The test manual you received when ordering the stress survey says that, on average, scores on this test vary by 1.25. Identify the appropriate confidence interval for the mean.

Expert Solution

which gives us the lower 99% as well as upper 99% confidence interval of values (2.442696458, 4.482303542) which does not contain 0 in the interval. Hence we can conclude that the Null hypothesis is rejected and the confidence interval at 99% confidence is given above.

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