# Question

In Example 20.5, we found a 95% confidence interval for the proportion of successes likely in a certain kind of ESP test. Construct a 99.7% confidence interval for that example. Explain why a skeptic of ESP would prefer to report the 99.7% confidence interval rather than the 95% confidence interval.

## Answer to relevant Questions

Refer to the formula for a confidence interval in the Focus on Formulas section. a. Write the formula for a 90% confidence interval for a proportion. b. Refer to Example 20.6. Construct a 90% confidence interval for the ...Refer to Exercise 22. Of the 193 placebo takers, 43 reported headaches. a. Compute a 95% confidence interval for the true population proportion that would get headaches after taking a placebo. b. Notice that a higher ...Use the Empirical Rule to specify what level of confidence would accompany each of the following confidence intervals. a. Sample proportion ± 1(SEP) b. Sample proportion ± 2(SEP) c. Sample proportion ± 3(SEP) Refer to Case Study 21.1, illustrating the role of calcium in reducing the symptoms of PMS. Using the caution given at the end of the case study, explain why we cannot use the method presented in Section 21.2 to compare ...The 95% confidence interval for “All Causes” is 1.06 to 1.37. Explain what this interval means in a few sentences that would be understood by some-one with no training in statistics. Make sure your explanation applies to ...Post your question

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