As the sample size n increases when the confidence

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13. As the sample size n increases, when the confidence level is held fixed the width of the confidence interval for the population mean tends to : 14. A random sample of size 49 was selected from a population with standard deviation 8.2. Suppose 5 œ the confidence interval formed for was 63 < < 69. . . a. What is the sample mean, x? b. What is the standard deviation of x? c. What was the confidence coefficient used to form the confidence interval?
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