ASSIGNMENT
SECTION 9
3) How many subjects participated in an independent-samples t-test if a researcher reports t(20) = 3.68?
SECTION 10
3) A linear regression procedure should ultimately yield a value called
the slope.
rho.
Y prime.
the proportion of variance accounted for.
5) “The more you save, the less you spend” describes
a nonlinear correlation.
a positive linear correlation.
a negative linear correlation.
no correlation.
6) The best-fitting line through a scatterplot is known as the
linear correlation line.
linear regression line.
linear variance line.
linear scatterplot line.
7) For this question refer to the graph and type the answer here –> :___________
8) For this question refer to the graph and type the answer here –> :___________
SECTION 11
1) An educational psychologist is interested in determining whether attitudes toward school change with age. She selects 30 seventh-graders, 30 ninth-graders, and 30 eleventh-graders and administers a “Do you like school?” test.
a. How many factors does this experiment have? (Type answer here) ___________
b. How many levels are there in the experiment? (Type answer here) ___________
c. What is the N in this experiment? (Type answer here) _____________
2) For Joan’s doctoral dissertation experiment, 15 wheelchair users were assigned to three groups with 5 in each group. These participants navigated in virtual-reality settings. Group 1 participants were in the virtual-reality setting (a building) as wheelchair users. Group 2 participants were in the virtual-reality setting in a wheelchair pushed by a walking person. Group 3 participants walked without aid in the virtual-reality setting. Joan measured the number the time needed to complete the navigation of the virtual-reality setting.
a. What is the dependent variable? (Type answer here) __________
b. What is the independent variables? (Type answer here) _________
c. How many levels are there? (Type answer here) _____________
d. What is the N? (Type answer here) _________________
5) Analysis of variance is designed to compare ___________ simultaneously.
all sample medians
all sample means
all sample ranges
some sample means
SECTION 12
2) If there are 4 participants per cell, in a 5 x 3 ANOVA, what is N?
15
60
32
120
3) In a 5 x 3 ANOVA, how many cells are present?
8
3
5
15
4) For which of the three F-tests in a two-way ANOVA do you collapse across the levels of the other factor(s) in computing the means?
The interaction effect
The B main effect
Both the A main effect and the B main effect
The A main effect
5) In a two-way ANOVA, a cell represents
one level of the A independent variable.
one level of the A independent variable and one level of the B independent variable.
all the subjects in the experiment.
one level of the dependent variable.
6) In a two-way ANOVA, the interaction effect is the
effect on the independent variables of changing the levels of a factor.
extent to which the effect of one factor depends on the action of the other factor.
effect of changing the levels of a factor on the dependent scores, ignoring all other factors in the study.
effect of changing the levels of a factor on the dependent scores.
7) In a two-way ANOVA, the main effect of a factor is the
extent to which its effect depends on the action of the other factor.
effect of changing the levels of the factor on the dependent variable scores, taking into account all other factors in the study.
extent to which the factor produces dependent variable scores different from those the other factor produced.
effect of changing the levels of the factor on the dependent variable scores, ignoring all other factors in the study.
8) In a 5 x 3 ANOVA, how many factors are present?
3
15
2
5
9) Which of the following is not one of the assumptions we must satisfy when conducting a two-way, between-subjects ANOVA?
The variances of all the represented populations are homogeneous.
The populations represented are normally distributed.
The means of all the populations represented are equal.
Each cell is an independent sample of interval or ratio scores.
10) The H0 for a main effect of a two-way ANOVA is the samples in the various levels are drawn from populations where there are
equal variances.
equal means.
unequal variances.
unequal means.
