Unformatted text preview: 14. The independent shops' prices aren't much different for the two car types (1802.00 vs. 1785.75) 15. -1 (just plot them and note they are in a straight line down from left to right) 16. A p value says nothing about practical importance. It just says that we can be statistically sure that the null hypothesis is not true. With large sample sizes you can easily be sure that the null hypothesis is slightly wrong, but nobody really cares about slight differences. 17. None of the above. 18. False. You can easily have a curved relationship, a poor fit for a straight line, and still have a small p value. You must plot the data or the residuals to assess the fit. 19. All of the above. 20. All the statments are true. (Taken from the reading of the lesson on Hypothesis Testing Preview.)...
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- Fall '08