# C anova model i all available retirement plans four

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c. ANOVA model I. All available retirement plans, four of them, were considered in the study. None were randomly sampled from a larger set of optional retirement plans. d. ANOVA model II. The factor levels are tire location, where 4 tire locations are selected at random from 18 possible locations.
25.9 Coil winding machines. A plant contains a large number of coil winding machines. A production analyst studied a certain characteristic o f the wound coils produced by these machines by selecting four machines at random and then choosing 10 coils at random from the day’s output of each selected machine. The results follow. j i 1 2 3 4 5 6 7 8 9 10 1 205 204 207 202 208 206 209 205 207 206 2 201 204 198 203 209 207 199 206 205 204 3 198 204 196 201 199 203 202 198 202 197 4 210 209 214 215 211 208 210 209 211 210 Assume that ANOVA model is appropriate. 1
a. Test whether or not the mean coil characteristic is the same for all machines in the plant; use α = . 10. State the alternatives, decision rule, and conclusion. What is the P -value of the test?