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Problem #4 financial energy utilities financial energy utilities 12.08 10.04 4.34 9.80 18.97 5.36 17.75 7.64 14.71 3.94 19.94 4.57 20.67 3.55 8.57 19.23 12.56 6.15 16.26 8.59 3.01 18.00 17.07 3.78 19.69 7.88 9.86 12.54 14.57 10.98 Are the rates of return different at the a = 0.05 level of significance? A stock analyst wondered whether the mean rate of return of financial, energy, and utility stocks differed over the past five years. He obtained a simple random sample of eight companies from each of the three sectors and obtained the five-year rates of return shown in the following table (in percent): State Population Density Crime Rate 1 2 3 4 5 6 7 8 WWPRSITY.COM 92.8 48.4 232.2 34.5 66.2 192.6 10.7 199.1 ecce- Problem #5 The following data represent the population density (people per square mile) and violent crime rate (crimes per 100,000 population) for a random sample of states. Is a state with a higher population density likely to have a higher violent crime rate? 448 348 533 453 289 466 169 270 9/11 UNIVESITY OF THE