Stats quiz 11

If the amount of variability due to within-group differences is equal to the amount of variability due to between-group differences, your F value will be equal to _______. Answers: 0 1 -1 2

0

When interpreting F(2, 27) = 8.80, p < .05, what is the between-groups df? Answers: 30 27 3 2

2

When interpreting F(2, 27) = 8.80, p < .05, what is the within-groups df? Answers: 30 27 3 2

27

When interpreting F(2, 27) = 8.80, p < .05, how many groups were examined? Answers: 30 27 3 2

3

When interpreting F(2, 27) = 8.80, p < .05, what is the total sample size examined? Answers: 30 29 3 2

30

If an ANOVA produced MSbetween = 20 and MSwithin = 5, then the F Statistic would be Answers: 4.00 .025 0.80 5.00

4.00

Which of the following is the formula for computing the F statistic? Answers: F = MSbetween ÷ MSwithin F = SSbetween ÷ SSwithin F = MSwithin ÷ MSbetween F = SSwithin ÷ SSbetween

F = MSbetween ÷ MSwithin

Factorial design is a simpler type of ANOVA in which there is only one treatment factor being explored. Answers: True False

False

When interpreting F(2, 27) = 8.80, p < .05, the obtained value is .05. Answers: True False

False

When interpreting F(2, 27) = 8.80, p < .05, you should accept the null hypothesis. Answers: True False

False

When computing the degrees of freedom for ANOVA, how is the within-group estimate calculated? Answers: n - 1 k - 1 N - k (n - 1) ÷ k

N - k

ANOVA constitutes a pairwise comparison. Answers: True False

True

When interpreting F(2, 27) = 8.80, p < .05, statistical significance has been found (use F table). Answers: True False

True

A researcher wants to create an intervention to improve the well-being of first-semester graduate students, so she gives one group of students specific doses of rocky road ice cream, the next group of students specific doses of licorice, and the third group of students specific doses of chewy fruit-flavored candies for their treatments. To analyze the differences in well-being between the types of "treatment," she would use a(n) _______. Answers: dependent-samples t-test analysis of variance independent-samples t-test repeated-measures analysis of variance

analysis of variance

The ANOVA can be used to test the differences _______. Answers: between two groups only more than two groups within a single group among three groups only

between two groups only

When computing the degrees of freedom for ANOVA, how is the between-group estimate calculated? Answers: n - 1 k - 1 N - k (n - 1) ÷ k

k - 1

What is the first step in the computation of the F statistic? Answers: setting the level of risk selecting the appropriate test computing the obtained value stating the null and research hypotheses

stating the null and research hypotheses

The ANOVA is like an extension of the _______. Answers: t-test F-test Correlation Regression

t-test

A simple analysis of variance is also called _______. Answers: the two-way analysis of variance factorial ANOVA correlational ANOVA the one-way analysis of variance

the one-way analysis of variance