_uestion 10 - A random sample of 39 observations with a mean of 72 is selected from a normally distributed population. Assume the p_opulation standard deviation is 16. 'I. In developing a(n) 80% confidence interval estimate for the population mean, determine the following values: a) [Do not round] Point Estimate:- b) [2 decimal places] Significance level (a): Round the critical value to two (2) decimal places and use the rounded value to calculate the remaining parts. c) [Enter a positive value] Critical value: d) [3 decimal places] Standard Error of the Mean = e) [1 decimal place] Margin of Error:- f) [1 decimal place] Lower Confidence Limit:- g) [1 decimal place] Upper Confidence Limit:- 2. How large a sample is required to keep the margin of error within 3 units with 80% confidence? Report your answer as an integer. Question Help: D Video Message instructor Submit