The random sample shown below was selected from a normal distribution.   10​, 8​, 5​, 4​, 7​, 2      Complete parts a and b.       a. Construct a 90​% confidence interval for the population mean μ.   enter your response here,enter your response here ​(Round to two decimal places as​ needed.)   b. Assume that sample mean x and sample standard deviations remain exactly the same as those you just calculated but that are based on a sample of n=25 observations. Repeat part a. What is the effect of increasing the sample size on the width of the confidence​ intervals?   The confidence interval is enter your response here,enter your response here. ​(Round to two decimal places as​ needed.)     What is the effect of the sample size on the width of the confidence​ interval?

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