6. -/1 POINTS BBBASICSTAT7 10.R.005. MY NOTES ASK YOUR TEACHER A random sample of 15 adult male wolves from the Canadian Northwest Territories gave an average weight x1 = 98 lb with estimated sample standard deviation s1 = 6.7 lb. Another sample of 23 adult male wolves from Alaska gave an average weight x2 = 91 lb with estimated sample standard deviation 52 = 7.3 lb. (a) Let /1 represent the population mean weight of adult male wolves from the Northwest Territories, and let /2 represent the population mean weight of adult male wolves from Alaska. Find a 75% confidence interval for #1 - #2. (Round your answers to one decimal place.) lower limit upper limit Ib (b) Examine the confidence interval and explain what it means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At the 75% level of confidence, does it appear that the average weight of adult male wolves from the Northwest Territories is greater than that of the Alaska wolves? O) Since the interval contains only positive values, we can say at the 75% confidence level that /1 > #2. Canadian wolves weigh more than Alaskan wolves. Since the interval contains only negative values, we can say at the 75% confidence level that /1 /2 O Ho: H1 > /2; H1: M1 # #2 O Ho: H1 + /2; H1 : H1 = /2 O Ho: H1 0.01, we fail to reject Ho. The data are not statistically significant. ( Since the P-value > 0.01, we reject Ho. The data are not statistically significant. O Since the P-value