Here are several computation practice exercises to help you identify which formulas pertain and learn how to
Question:
a. Determine confidence intervals for each of the following:
1. Mean of 150, s.d. of 30, n of 200, level of 95% - Use mean equation
2. Percent of 67%, n of 300, level of 99% - Use percentage formula
3. Mean of 5.4, s.d. of 0.5, n of 250, level of 99% - Use mean formula
4. Percent of 25.8%, n of 500, level of 99% - Use percentage formula
b. Test the hypothesis and interpret your findings.
1. Hypothesis: mean=7.5, mean of 8.5, s.d. of 1.2, n of 670, level of 95%
2. Hypothesis: percent=86%, p of 95%, n of 1,000, level of 99%
3. Hypothesis: mean greater than 125, mean of 135, sd of 15, n of 500, level of 95%
4. Hypothesis: percent less than 33%, p of 31, n of 120, level of 99%
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