Exam 13: Post Hoc Analysis of Factorial Anova

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -The results of Tukey's test for the main effect of drug levels reveal that

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -Tukey's HSD value for the interaction between gender and drug levels (at p = .05) is

In a 3 × 5 factorial ANOVA, there will be ____ means in the interaction.

With a df_error of 16, r = 5, and a = .05, Tukey's q value would be

Which of the following statements would probably have the fewest objections from statisticians?

In an effect size analysis in a two-factor ANOVA for a main effect, k is equal to

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -When comparing boys and girls in the interaction, which of the following is true?

In the graphic plot of an interaction in factorial ANOVA, parallel lines indicate

Because there are only two possible hypothesis testing outcomes (significant or not) and there are two main effects and an interaction in a 2 × 2 factorial ANOVA, then there are ____ possible outcomes.

When checking for the significance of a main effect, the degrees of freedom for the denominator are equal to the

Which of the following is not true:

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -For the girls, the results of Tukey's test for in the interaction revealed

A significant main effect always requires a post hoc analysis

When checking for the significance of a main effect, the degrees of freedom for the numerator are the

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -Overall, for the interaction, which of the following is true?

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -For the boys, the results of Tukey's test in the interaction revealed

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -The q value at p = .05 for Tukey's HSD for the interaction between gender and drug levels is

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -Tukey's HSD value at p = .05 for the main effect for drug levels is

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants). Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory). Boys Girls Cylert Placebo Ritalin Cylert Placebo Ritalin 12 5 3 5 4 12 10 6 2 6 6 9 13 7 5 2 7 14 10 6 6 4 6 13 9 4 1 3 5 9 12 5 4 2 4 12 13 6 2 4 5 8 10 7 6 6 6 15 11 5 1 2 7 12 12 7 5 4 7 11 -The q value at p = .05 for Tukey's HSD test for the main effect for drug levels is

In the calculation of Tukey's HSD value, the calculation can be made at either p < .05 or .01