Here are several computation practice exercises to help you identify which formulas pertain and learn how to perform the necessary calculations. In each case, perform the necessary calculations and write your answers in the column identified by “Your Confidence Intervals” or “Your Test Results.”

a. Determine confidence intervals for each of the following

b. Test the following hypothesis and interpret your findings

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Sample Statistic Mean: 150 Standard Deviation: 30 Percent: 67% Mean: 5.4 Standard Deviation: 0.5 Percent: 25.8% Sample Confidence Size 200 300 250 500 Level 95% 99% 99% 99% Your Confidence Intervals