In the following problems calculating confidence intervals, the lower bound and

Question

In the following problems calculating confidence intervals, the lower bound and upper bound will be separate answers.   For example, the first question will have two answers: (1) Lower bound of the interval and (2) the upper bound.

Suppose we have the following information. The sample size is 16, the sample mean is 25, and the sample standard deviation is 5.2. Compute the following:

Find a 90% confidence interval for the population mean?

Lower Bound

Upper Bound

Find a 95% confidence interval for the population mean?

Lower Bound

Upper Bound

Find a 99% confidence interval for the population mean?

Lower Bound

Upper Bound

Find a 90% confidence interval for the population mean?

Lower Bound

Upper Bound

Find a 95% confidence interval for the population mean?

Lower Bound

Upper Bound

Find a 99% confidence interval for the population mean?

Lower Bound

Upper Bound

Explanation / Answer

90% confidence interval alpha / 2 = 0.05 df = 15 t = 1.753 I: 25 +/- 1.753 * 5.2 / srqt 16 25 +/- 2.2789 22.7211

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