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Confidence Intervals for Population Means When the Population Standard Deviation is Unknown. Use the table of critical...

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Statistics

Confidence Intervals for Population Means When the PopulationStandard Deviation is Unknown.

Use the table of critical values of t to find the following:Construct a confidence interval for the population mean at thegiven confidence level. Remember to find your degrees offreedom.

4. n = 25, x = 56, s = 8, level of confidence is 95% 2

5. n = 36, x = 23.6 s = 4.2 level of confidence is 90%

6. Level of confidence is 98%. 272, 334, 288, 299, 312, 315,309, 275, 325, 312

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