\fAn analysis was conducted by the Statistics l[Consulting lillenter at Virginia Tech in conjunction with the Department of Forestry. A certain treatment was applied to a set of tree slumps in which the chemical Ganon was used with the purpose of regenerating the roots of the stumps. A spray was used with four levels of Barton concentration. Alter a period of time, the height of the shoots was observed. Perform a onefactor analysis of variance on the following data. Test to see if the concentration of lGadon has a signicant impact on the height of the shoots. Use o = BLUE. Gal-Ion Level \fA company that stamps gaskets out of sheets of rubber, plastic, and cork wants to compare the mean number of gaskets produced per hourfor the three types of material. Two randomly selected stamping machines are chosen as blocks. The data represent the number of gaskets [in thousands} produced per hour. The data is given below. In addition, the printout analysis is given in Figure 13.15 on page 55?. Machine Rubber Plastic '1": .' _ _ l .. . i ' 3.4 {3) Why would the stampng machines be chosen as blocks? {b} F-'lot the so: means for machine and material combinations. {c} Is there a single material that is best? {d} Is there an interaction behryeen treatments and blocks? If so, is the interaction causing any serious difculty in arriving at a proper conclusion? Explain. Figure 13.16 The GLH Procedure 3 3.33 3.43 99 3.34 3.31 3. Dependent Variable: gasket Sum of Source 9F Squares Mean Square F Value Pr 3 F Model 5 1.68192TTS 9.33624556 T.52 {.9991 Error 12 9.959?3333 9.99439444 Corrected Total 1? 1.?3396111 Rquuare Coeff Sar Root HSE gasket Hean 9.969538 1.?34995 9.966991 3.822TT8 Source 9F Type III SS Mean Square F Value Pr 3 F material 2 9.31194444 9.4959?222 92.38 {.9991 machine 1 9.19195999 9.19125999 23.94 9.9994 \f\fIn a study that was analyzed for personnel in the Department of Biochemistry at'y'irginia Tech, three diets were given to groups of rats in order to study the effect of each on dietary residual zinc in the bloodstream. Fiye pregnant rats were randomly assigned to each diet group, and each was given the diet on day 22 of pregnancy. The amount of zinc in parts per million was 1 I151] 1142 0.65 (1.4? [Li-i measured. The data are as TDIIGWSI Diet 2 I142 [Lil] 0333 (1.4? 0.69 Determine if 3 1.06 [LB-2 DJ"? (1?? 0.82 there is a signicant difference in residual dietary zinc among the three diets. Use a = CLUE. Perform a oneway ANDVA