A study has been undertaken to examine the effect of background music and assembly method on the productivity of workers on a production line for electronic circuit boards. Each of 8 workers has been randomly assigned to one of 4 cells, as shown here. So that each worker will hear only the intended type of music, headphones are used for the background music in the experiment. Data are the number of circuit boards assembled in 1 hour. Using the 0.05 level of significance in testing for the main and interactive effects, what conclusions should be drawn from this experiment? Determine the 95% confidence interval for the population mean for each factor level. (Use data file XR12075.)
Answer to relevant QuestionsFor Exercise 12.75, and using the levels of the assembly method factor as the horizontal axis and “units produced” as the vertical axis, plot and connect the cell means for the cells associated with the “classical ...Compare the respective purposes of one-way, randomized block, and two-way analysis of variance. In general, under what circumstances would each method be used? Given the following data from three in de pen dent samples, use the 0.025 level in determining whether the population means could be the same. (Use data file XR12092.) Ted and Luke Thorndike have been approached by several local racquetball players, each of whom would like to be sponsored by Thorndike Sports Equipment during regional tournaments to be held during the next calendar year. In ...Sample data have been collected, and the null hypothesis to be tested is H0: “The sample was drawn from a normal population in which μ = 130.” If the analysis is based on a categorization that includes 8 cells: a. How ...
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