The number of cell phones per 100 residents in countries in Europe is given in table #9.3.9 for the year 2010. The number of cell phones per 100 residents in countries of the Americas is given in table #9.3.10 also for the year 2010 ("Population reference bureau," 2013). Find the 98% confidence interval for the different in mean number of cell phones per 100 residents in Europe and the Americas. Table #9.3.9: Number of Cell Phones per 100 Residents in Europe
100 76 100 130 75 84
112 84 138 133 118 134
126 188 129 93 64 128
124 122 109 121 127 152
96 63 99 95 151 147
123 95 67 67 118 125
110 115 140 115 141 77
98 102 102 112 118 118
54 23 121 126 47

Table #9.3.10: Number of Cell Phones per 100 Residents in the Americas
158 117 106 159 53 50
78 66 88 92 42 3
150 72 86 113 50 58
70 109 37 32 85 101
75 69 55 115 95 73
86 157 100 119 81 113
87 105 96