The random sample shown below was selected from a normal distribution. 7, 10, 8, 3, 6, 2 O Complete parts a and b. ..... a. Construct a 90% confidence interval for the population mean p. ( 3.51 , 8.49...

Extracted text: The random sample shown below was selected from a normal distribution. 7, 10, 8, 3, 6, 2 O Complete parts a and b. ..... a. Construct a 90% confidence interval for the population mean p. ( 3.51 , 8.49 ) (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 is the effect of increasing the sample size on the width of the confidence intervals? The confidence interval is ( ). (Round to two decimal places as needed.)