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NEED STE WISE SOLUTION

\flConsider the data set in Exercise 14.12 and answer the following questions. {a} Both factors, copper and time, are quantitative in nature. As a result, a regression model may:r be of interest. Describe 1.Ivhat might be an appropriate model using :1 = copper content and 12 = time. F'rt the model to the data, showing regression coefcients and a ttest on each. {h} F'rt the model i" - u +3312: + Eon + ies-Ir! +331\"? + 1332131- t.- and corrpare it to the one you chose in [a]. IIrl'll'hich is more appropriate? Use Read] as a criterion. Exercise 14.12: In an experiment conducted in the Civil Engineering Department at 'v'irg'nia Tech, growdt of a certain type of algae in water was observed as a function of time and the dosage of copper added to the water. The data are as follows. Response is in units of algae. Timeium Copper 5 12 13 1 0.3!] {137 (1.25 0.34. {1.33 i123 [1.32 {135 I11! 1 [L24 [1311 (LET [123 {1.32 (1.25 [122 {131 (1.25 3 [LS] {131] (LET [128 {1.31 [1.29 [1.24. {1.30 I125 {a} Do an analysis of variance and show the analvsisof variance table. {tr} Corrl'nent concerning whether the data are suilicient to show a time effect on algae concentration. {c} Do the same for copper content. Does the level of copper impact algae conoentration'? {d} Corrment on the resutts of the test for interaction. Hovur is the effect of copper content inuenced by time? \f\f\fThe method of Xray uorescence is an important analytical tool for determining the concentration of material in solid missile propellants. In the paper An Xray Fluorescence Mewd forAnalyzing PotybutadieneAcqtchud {PEAAJ Propellants {Quarterly Report, RKTREEl Amy Ordinance Missile Command, 1962], it is postulated that the propellant mixing process and analysis time have an inuence on the homogeneity of the material and hence on the accuracy of illray intensity measurements. An experiment was conducted using 3 factors: A, the mixing conditions conditions {4 levels}; B, the analysis time {2 levels}; and G, the method of loading propellant into sample holders [hot and room temperature]. The following data, which represent the weight percent of ammonium perchlorate in a particular propellant, were recorded. {a} Perform an analysis ofyan'anee with o = {101 to test for significant main and interaction effects. {b} Discuss the influence of the three factors on the weig'lt percent of arrmonium percl'rlorate. Let your discussion involve the role of any sign'rlicant interaction