Question: Compare the formula for an approximate 95% confidence interval given on page 420 in Lesson 2 with the general formula for a confidence interval in

Compare the formula for an approximate 95% confidence interval given on page 420 in Lesson 2 with the general formula for a confidence interval in the formula box on page 420 in Chapter 10.

a. What is different about the two formulas?

b. In finding a confidence interval for one population mean, what condition must be satisfied in order to use the approximate 95% confidence interval formula?

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