Quiz: Final
Due Oct 10 at 11:59pm
Points 90
Questions 30
Time Limit 120 Minutes
Allowed Attempts Unlimited
This quiz is no longer available as the course has been concluded.
Attempt History
Attempt Time Score
KEPT Attempt 4 14 minutes 90 out of 90
LATEST Attempt 4 14 minutes 90 out of 90
Attempt 3 35 minutes 78 out of 90
Attempt 2 73 minutes 87 out of 90
Attempt 1 20 minutes 84 out of 90
Correct answers are hidden.
Score for this attempt: 90 out of 90
Submitted Sep 11 at 1:30pm
This attempt took 14 minutes.
Question 1
3 / 3 pts
How would a researcher interpret an η2 value of .27?
27% of the variance in one variable is explained by another variable.
2.7% of the variance in one variable is explained by another variable.
.27% of the variance in one variable is explained by another variable.
.05% of the variance in one variable is explained by another variable.
Question 2
3 / 3 pts
If nominal alpha is set to .01, which of these p values would be considered criteria for rejecting the null
hypothesis?
.009
.03
.04
.042
Question 3
3 / 3 pts
What does each row in the “variable view” represent?
a variable
a person or a case
a group
a treatment type
Question 4
3 / 3 pts
Assigning individuals to groups based on a variable related to (i.e., may covary with the dependent
variable) the study variable of interest is:
matching
random assignment
random sampling
convenience sampling
Question 5
3 / 3 pts
The standard error of the mean is conceptually similar to:
the standard deviation
variance
sum of squared deviations
causal inference
Question 6
3 / 3 pts
All of the following should be included in the results section of a t test except:
Levene confidence intervals
dependent measure
homogeneity of variance test
effect size
Question 7
3 / 3 pts
Which statement would be inappropriate to use when interpreting the significance level of a variable.
The difference was found to be significant at the p < .001 level, making it highly significant.
The difference was found to be significant at the p < .001 level.
The difference was found to not be significant with a p value of p > .05.
The difference was found to be significant at the p <.05 level.
Question 8
3 / 3 pts
We estimate error because:
it helps understand the relationship between our sample and the population
it effects the standard deviation
its conventional to do so
our population is hypothetical
Question 9
3 / 3 pts
If nominal alpha is set to .01, what p value would be considered statistically significant?
.004
.05
05
.03
Question 10
3 / 3 pts
The table in your SPSS output that directly assesses one of the assumptions for ANOVA is _______.
Levene Statistic
ANOVA table
planned contrasts
post hoc table
Question 11
3 / 3 pts
For which of the following sets of variables is it NOT appropriate to use cross-tabulations?
relationship status and IQ
relationship status and gender
ethnicity and eye color
ethnicity and college major
Question 12
3 / 3 pts
Which of the following is NOT one of the steps for calculating a confidence interval?
calculate the F ratio
calculate the SEM
determine df
determine tcritical
Question 13
3 / 3 pts
In reporting a statistical analysis, a researcher writes "p > .05". By definition, this implies ______.
the means of the groups are not different from each other
the statistic was in the region of rejection
p < .01
the null hypothesis was rejected
Question 14
3 / 3 pts
Which of the following is an assumption of ANOVA?
Independent random samples are used
The population variances are statistically significant
The dependent variable is a nominal level of measurement
The population is not normally distributed
Question 15
3 / 3 pts
In calculating the Pearson correlation (r), the _____ hypothesis implies ____.
null; there is no relationship
alternative; the sample mean is different from the hypothesized population mean
null; the means are not all equal to each other
alternative; the relationship is not linear
Question 16
3 / 3 pts
Which of the following would be considered a ‘large’ effect size according to Cohen?
r2 = .01 r2
= .16
r2 = .36
r2 = .03
Question 17
3 / 3 pts
The probability of making at least one Type I error across a set of comparison is referred to as _____.
experiment-wise error
total error
unpredicted error
explained error
Question 18
3 / 3 pts
In a one-tailed test, what do you do first?
examine the means to determine if they are consistent with the hypothesized difference
check the Sig column
check the Sig (two-tailed) column
check the t column
Question 19
3 / 3 pts
The must do all of the following before you interpreting your SPSS output for ANOVA is _______.
assess the Levene test to determine if you reject the null hypothesis for group means
examine the means and standard deviations of your groups
assess the planned contrasts relative to the null hypothesis
examine the post hoc table for differences in means
Question 20
3 / 3 pts
The data screening for the ANOVA involves:
examining the histogram for the dependent variable
examining the histogram for the independent variable
examining the scatterplot for the dependent variable
examining the scatterplot for the independent variable
Question 21
3 / 3 pts
Statistical power is NOT dependent upon the:
population mean
sample size
effect size
nominal alpha level
Question 22
3 / 3 pts
If a researcher wants to create a bar chart in SPSS, which menu selection sequence should be used?
graphs, legacy dialogs, bar
analyze, graphs, bar
analyze, legacy dialogs, bar
graphs, bar, chart
Question 23
3 / 3 pts
Approximately two-thirds of all values in the standard normal distribution fall within how many standard
deviations of the mean?
1 6
3
2.5
Question 24
3 / 3 pts
In SPSS, which main menu can you find ANOVA under?
Analayze
Transform
Graphs
Utilities
Question 25
3 / 3 pts
If the nominal alpha is set to .05, what p value would be considered statistically significant?
.022
.22
2.2
22
Question 26
3 / 3 pts
The Bonferroni adjustment adjusts ______.
adjusts the α level based on the number of the individual pairwise comparisons
adjusts the critical value of r for the Pearson's r
adjusts the degrees of freedom for the inflated familywise error rate
adjusts the critical value based on the number of the individual pairwise comparisons
Question 27
3 / 3 pts
The _____ is calculated by ______ different types of variability.
degrees of freedom; multiplying
F-ratio; dividing
F-ratio; adding
variance; combining
Question 28
3 / 3 pts
What percentage of scores are within one standard deviation above AND below the mean?
68.26 13.87
95.44
99.72
Question 29
3 / 3 pts
In simple random sampling, population members:
have an equal chance of being
selected are all selected
have a low probability of being selected
are selected to ensure equality among groups
Question 30
3 / 3 pts
What is the purpose of Levene's Test?
determine if the homogeneity of variance assumption was violated
determine if the independence of observations assumption was violated
determine if the group means are diffferent
determine if the population means are different
Quiz Score: 90 out of 90
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