2. Here are the data on degree of Reading Power (DRP) scores for a sample of 32 third-grade students collected to estimate the unknown mean DRP score for all third-grade students. Suppose the standard deviation of the population of DRP scores is known to be 11. 40 26 39 14 42 45 25 23 26 46 19 12 45 25 26 24 28 29 24 21 22 35 34 35 38 37 39 41 45 32 25 23 a. What is the parameter the confidence interval below is estimating? Is it known? b. Find the sample estimate of mean DRP scores. c. Write a 90% confidence interval for the population mean DRP score. 3. Then Maxto and Therent d. Give a 95% confidence interval for the population mean DRP score. Compare with the above interval. Which one is bigger and why? Which interval it biggerand why