Thanks so much for helping.

Question 5 of 10, Step 1 of 4 6/20 Correct 3 A state legislator wants to determine whether his voters' performance rating (0 - 100) has changed from last year to this year. The following table shows the legislator's performance from the same ten randomly selected voters for last year and this year. Use this data to find the 90 % confidence interval for the true difference between the population means. Assume that the populations of voters' performance ratings are normally distributed for both this year and last year. Rating (last year) 75 80 75 74 88 79 53 63 69 78 Rating (this year) 85 69 54 63 63 91 58 52 89 72 Copy Data Step 1 of 4 : Find the point estimate for the population mean of the paired differences. Let. be the rating from last year and x2 be the rating from this year and use the formula d = x2 - * to calculate the paired differences. Round your answer to one decimal place. Tables and Keypad Answer How to enter your answer Keyboard Shortcuts