Refer to Exercise 11.76.
a. Obtain the regression line with the one unusual town removed from the data set.
b. Estimate the expenditure on public safety for a town of 37,000 people. Compare this estimate with an estimate using the complete data set.
c. Compare the estimated slope from the regression fit using the data set with the unusual town removed to the estimated slope from the regression fit using the complete data set? Discuss the impact of an extreme data value on the reliability of the inferences that can be made from the data about the population from which the data were obtained.
In exercise

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TownPo Expend 140 142 165 75 143 4 142 144 1445 138 Town Pop Expend 141 40 139 137 1372 1370 136.5 136 135.5 TownPop3840 43 4 49495 52 60 76 Expend 10 132 28 135 129 126 70 95 310 20 24 31 32 32 32 36 36