The random sample shown below was selected from a normal distribution. 5, 9, 5, 8, 7, 2 O Complete parts a and b. a. Construct a 95% confidence interval for the population mean u. D (Round to two decimal places as needed.) b. Assume that sample mean x and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of n 25 observations. Repeat part a. What the effect of increasing the sample size on width of the confidence intervals? The confidence interval is ( D. (Round to two decimal places as needed.) What is the effect of the sample size on the width of the confidence interval? O A. As the sample size increases, the width stays the same. O B. As the sample size increases, the width increases. O C. As the sample size increases, the width decreases.

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