M Stat 525 EXAM - aserrano@umas x midtermS22.pdf X Homework Help - Q&A from Onl x C Chegg Search x M Inbox (341) - alejandroserrano21 x + V X C O File | C:/Users/Alejandro/Downloads/midtermS22.pdf Update : Apps Reading list E midtermS22.pdf 2 / 5 | - 100% + 1. (30 points) You sample 50 squirrels, measuring for each squirrel i the number of hairs on its tail (in thousand) X; and its weight (in pounds) Y;. Assume the errors are normally distributed. You compute the following E(Xi - X) (Y, - Y) = -108.8425, E(Xi - X)2 = 21.59268, i= 1 i= 1 50 50 2 E(Y: - Y)2 = 10412.5, [ (Y - Y)2 = 548.6439, where X = 3.05918, Y = 25.5 are the sample means. (a) Find the least square estimators for Bo, B1. (b) By how much do you expect the weight of the squirrel to change if the haircount decreases by 2 (thousands of hairs)? (Assume this question lies in the scope of the model.) (c) Conduct a t test to determine whether or not there is a linear association be- 3 tween haircount and weight. Control the a risk at 0.05. State the alternatives, decision rule and conclusions. Type here to search O G E W R 31F Mostly cloudy ~ 9 4 ENG 9:59 AM 3/10/2022 E