Problem 6.4 The number of cell phones per 100 residents in Europe countries is given in table for the year 2010. Second table shows the number of cell phones per 100 residents in Americas countries for the year 2010. . Find the 98%% confidence interval for the difference in mean number of cell phones per 100 residents in Europe and the Americas countries. Num + of Cell Phones per 100 Residents in Europe 100 76 100 130 75 112 84 138 133 118 126 188 129 DE 124 122 109 121 127 123 95 67 57 118 110 115 140 115 141 Number of Cell Phones per 100 Residents in the Americas 158 117 106 159 53 78 56 88 42 150 72 86 113 50 70 109 37 32 85 59 115 36 157 100 119 81Steps to follow. . In Calculate mean and standard deviation for each table: X 1, 51, X 2 52. . Find difference in sample means X = X 1 - X 2 . This will be the center of our confidence interval. 51 . For Margin of Error use the formula: E = t* + . In our case, m = na = 30; t-factor find from the following Applet: https://goodcalculators.com/student-t-value-calculator You will need of = df1 + df2 = (30 - 1) + (30 -1) = 58 and a = 1 -0.98 = 0.02 . After you have * and E you can create the confidence interval: X # E, (x - E, x + E)