Two groups of drivers are surveyed to see how many miles per week they drive for pleasure trips. The data are shown. At a 0.01, can it be concluded that single drivers do more driving for pleasure trips on average than married drivers? Assume σ1= 16.7 and σ2 = 16.1.

a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.

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Single drivers Married drivers 106 110 115 121 13297 104 138 102 115 119 97 118 122 135133 120 9 136 96 110 117 116 138 142139 108 117 145 114 115 114 103 98 99140 136 13 113 150 108 117 152 147 117101 114 116 113 135 154 86 115 116 104115 109 147 106 88 107 133 138 142 140113 119 99 108 105