Exercises 71 and 73 give summaries and displays for car insurance premiums quoted by a local agent and an online company. Test an appropriate hypothesis to see if there is evidence that drivers might save money by switching to the online company.
In exercise 73

In exercise 73

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Local Online PriceDiff 391 872 602 488 903 677 1021 1270 703 789 568 270 ー37 326 72 -249 80 451 1229 605 783 844 907 10810 712 702 10 250 1000 a 750 500 Local Online 3 -400 -200 200 Price Diff ($)