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Let the following sample of 8 observations be drawn from a normal population with unknown mean...

Let the following sample of 8 observations be drawn from a normal population with unknown mean and standard deviation: 23, 26, 22, 20, 16, 21, 25, 24. [You may find it useful to reference the t table.]

a. Calculate the sample mean and the sample standard deviation. (Round intermediate calculations to at least 4 decimal places. Round "Sample mean" to 3 decimal places and "Sample standard deviation" to 2 decimal places.)


b. Construct the 90% confidence interval for the population mean. (Round "t" value to 3 decimal places and final answers to 2 decimal places.)


c. Construct the 95% confidence interval for the population mean. (Round "t" value to 3 decimal places and final answers to 2 decimal places.)


Math   Statistics-And-Probability   
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