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Statistics Tutor Diagnostic Exam - At-Home Tutoring Services®
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Statistics Tutor Diagnostic Exam
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1.
Which measure of central tendency is most affected by extreme values in a dataset?
A. Mean
B. Median
C. Mode
D. Geometric mean
A
B
C
D
2.
B
A
C
D
3.
In regression analysis, what does
R
2
represent?
A. The slope of the regression line
B. The correlation coefficient
C. The coefficient of determination
D. The standard error
A
B
D
C
4.
Which sampling method involves dividing the population into subgroups and then randomly sampling from each subgroup?
A. Simple random sampling
B. Systematic sampling
C. Stratified sampling
D. Cluster sampling
D
B
C
A
5.
In a normal distribution, what percentage of data falls within two standard deviations of the mean?
A. Approximately 68%
B. Approximately 95%
C. Approximately 99.7%
D. Approximately 90%
D
A
C
B
6.
Which of the following is NOT an assumption of linear regression?
A. Linearity of variables
B. Independence of errors
C. Non-normal distribution of residuals
D. Homoscedasticity
A
C
D
B
7.
When conducting a hypothesis test, if p < α, what action should be taken?
A. Accept the null hypothesis
B. Reject the null hypothesis
C. Accept the alternative hypothesis
D. No action needed
B
A
C
D
8.
Which test would be most appropriate for comparing means between two independent groups?
A. Chi-square test
B. Paired t-test
C. Independent t-test
D. ANOVA
C
B
A
D
9.
What is the probability of Type II error often denoted as?
A. Alpha (α)
B. Beta (β)
C. Gamma (γ)
D. Delta (δ)
A
C
B
D
10.
What is the correlation coefficient range that indicates a perfect negative linear relationship?
A.
r=0
B.
r=−1
C.
r=1
D.
r=0.5
A
D
C
B
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About A-HTS®
About Us
Our Roots
Our Team
Sara J. Downey
Chivonne Martinez
Rachel Seymour
Jenna Rico
Luciana Mandal
Locations
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The Woodlands, TX
Fort Bend County, TX
Dallas/Fort Worth, TX
Austin, TX
Nationwide Locations
Services
Subject Tutoring
Online Math Tutoring
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