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Statistical Inferences
Statistical Inferences
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Flashcards
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Questions
20
Answers
1
CONTINUOUS data are usually QUANTATIVE data
False
True
2
Frequency histograms are usually used to...
Visualize T-test results
Visualize two-way ANOVA results
Visualize chi-square results
Depict the distribution of data
3
Regression is used to test for an association between a
continuous
predictor variable and
categorial
response.
False
True
4
Which of the following determines whether or not the null can be rejected?
R2
Standard deviation
P-value
Arithmatic mean
5
Which of the following is true about
two-way ANOVA
?
It produces three R2
It produces one p-value
It tests the three null hypotheses
It involves one continuous predictor
6
T-tests include main effects and interaction effects
False
True
7
Which of the following statistics test for differences in the means between groups?
T-test
Regression
Two-way ANOVA
ANOVA
8
ANOVA cannot be used for studies with eight or more groups
False
True
9
Which of the following can be used to describe the central tendency of a test sample?
Standard Deviation
Variance
Mean
Median
10
Which of the follow are multivariate statistics?
Two-Way ANOVA
ANOVA
ANCOVA
Regression
11
In an ANCOVA, a p<0.05 for the interaction term means...
The effect of the continuous variable varies between categories
Neither the categorical nor the continuous variable is significant
The categorical variable has a significant effect
The continuous variable has a significant effect
12
Standard deviation
and
variance
tell you the same information, just with different units
True
False
13
In an ANCOVA, the different categories are usually depicted...
with different x-axis scales
via pie-charts
only in table format
with different colors
14
A high R
2
allows one to reject the null hypothesis.
True
False
15
A small p-value (<0.05) in which of the following terms means the effects of one independent variable depend on another?
interaction effects
continuous variables in ANCOVA
main effects in ANCOVA and two-way ANOVA
categorial variables in two-way ANOVA
16
Which statistical test is limited to comparing the means of two groups?
Chi-Square
ANOVA
T-test
ANCOVA
17
All of the statistical tests we considered are designed to evaluate whether or not we can reject the null hypothesis.
False
True
18
Which of the following factors increases the probability of a low p-value in a T-test
Decreased sample size
Low variance within each group
Big differences in means
Running an ANCOVA first
19
I wish we could go over statistical tests details for forever! Nevermind biology!
False
True
20
CATEGORICAL data are usually QUALITATIVE data.
False
True
