1)

'I. Choose whether to use a linear regression model or the mean of the 11,:fiia'alues as an estimate for an xvaloe. Based on the data of 6 students, the regression equation is given by J? = 513 + LEE, 3? = T52 and r = .224; Use a signicanoe level of o = l].l]5. Find the best predicted 1.ralue for x. 2. Perform a hypothesis test. Give the null hypothesis, alternative hypothesis, reject or fail to reject the null hypothesis, and give the conclusion. Test at the Claim: P1 123) given the mean is 112 and the standard deviation is 7. Assume that the population is normally distributed