Question C help

Math 150: Data & Probability Connections Worksheet 3.6 Name: Grace cortoitt The Wicomico County Board of Education is in the process of developing a new exam to evaluate the reading level of all fourth graders in the county. To pilot the exam, it was administered to 20 randomly chosen fourth graders from the county. This sample of students had a mean exam score of 72.3 and a standard deviation of 9.7 points. a) Assuming that the population of exam scores is normally distributed, construct and interpret a 98% confidence interval to estimate the mean exam score for the population of Wicomico County fourth-graders. b) Does your confidence interval provide sufficient evidence for the county to conclude that the mean exam score for the population of county fourth graders is below 80 points? Explain. c) Does your confidence interval provide sufficient evidence for the county to conclude that the mean exam score for the population of county fourth-graders exceeds 70 points? Explain