The following is a list of 20 scores of a pre-board examination of Certified Public Accountant (CPA) reviews in Taxation: 70 81 61 93 66 83 68 90 91 94 84 85 89 85 74 83 72 90 84 88 a. Find the 95% confidence interval of the population mean. b. Find the margin of error using 95% level of confidence. (Round to the nearest hundredths) c. What is the point estimate of the mean scores?

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