Exam 25: Analysis of Experiments and Observational Studies

The plot of ANOVA residuals shown below indicates that the ________________________ .

Quality control engineers fire tiles made with this new material at three different temperature settings (1500ºF, 1800ºF and 2200ºF) and for four different times (2 hours, 6 hours, 10 hours and 12 hours) to determine the optimal parameter settings for firing that will result in tiles with high flexural strength.The response variable in this experiment is ________________________ .

An advocacy group is interested in determining if gender (1 = Female, 2 = Male) affects executive level salaries in three different industries: (1 = Consumer Goods, 2 = Financial, 3 = Health Care).The number of treatments in this example is ________________________ .

Quality control engineers fire tiles made with a new material at three different temperature settings (1500ºF, 1800ºF and 2200ºF) and for four different times (2 hours, 6 hours, 10 hours and 12 hours) to determine the optimal parameter settings for firing that will result in tiles with high flexural strength.The number of treatments in this experiment is ________________________ .

Based on the partial ANOVA results shown below, the F statistic value is ________________________ .

A health food company is examining three different blanching processes to determine which is best in terms of vitamin A retention (mg/100mg) for dark green vegetable material.The response variable is ________________________ .

Data obtained from a survey of online customers were analyzed to see if gender and income level influence the amount consumers spend online for holiday shopping.The interaction plot shown below suggests that ________________________

In ANOVA, the Bonferroni method is used to ________________________ .

Based on the partial ANOVA results shown below, the F statistic value is ________________________ .