Linear Regression,

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7. Refer to "Solution concentration" data ("Solution.txt"). A chemist studied the concentration of a solution (Y) over time (X). Fifteen identical solutions were prepared. The 15 solutions were randomly divided into five sets of three, and the five sets were measured, respectively, after 1, 3, 5, 7, and 9 hours. (a) Fit a linear regression function. (b) Prepare a scatter plot between Y and X. Do you think the linear regression function in part (a) is appropriate? (c) Perform the F test to determine whether or not there is lack of fit of a linear regression function; use o = 0.05. State the hypothesis, test statistic, decision rule, and conclusion. Does your conclusion support your preliminary findings in part (b)? (d) Use the Box-Cox procedure to find an appropriate power transformation. What transformation of Y is suggested