The data whether music helps or hinders math performance are reproduced here . Student 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Time with music (sec) 83 119 77 75 64 106 70 69 60 76 97 68 77 48 Time without music (sec) 70 106 71 67 59 112 83 69 65 83 38 90 76 68 50 Difference (Music - Without music) 13 13 6 8 5 -6 -13 0 -5 -7 9 7 -8 9 -2 Student 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time with music (sec) 78 113 71 77 37 50 58 52 47 71 146 44 53 57 39 Time without music (sec) 73 93 59 70 39 52 60 54 51 60 141 40 56 53 37 Difference (Music - Without music) 5 20 12 7 -2 -2 -2 -2 - 11 5 4 -3 4 2 1. Construct and interpret a 90 % confidence interval for the true mean difference 2. What does the interval in Question 1 suggest about whether music helps or hinders math performance ? Explain your