Refer to Problem 29.
a. Perform the required hypothesis test, using the Wilcoxon signedrank test.
b. In performing the hypothesis test in part (a), what assumption did you make about the distribution of last year's values lost to purse snatching?
c. In Problem 29, we used the t-test to perform the hypothesis test. The assumption in that problem is that last year's values lost to purse snatching are normally distributed. If that assumption is true, why is it permissible to perform a Wilcoxon signed-rank test for the mean value lost?
Problem 29,
The Federal Bureau of Investigation (FBI) compiles information on robbery and property crimes by type and selected characteristic and publishes its findings in Uniform Crime Reports. According to that document, the mean value lost to purse snatching was $468 in 2012. For last year, 12 randomly selected purse-snatching offenses yielded the following values lost, to the nearest dollar.

415 539 365 479 375 303 572 487 550 481 371 523