WGU C207 OA FINAL EXAM
WGU C207 OA/WGUC207OA FINALEXAM 2026 Final Self Assessment Actual
Questions And Correct Detailed Answers
1. A graduate student is analyzing a dataset to determine whether there is a
statistically significant relationship between study hours and exam scores. The
student wants to measure the strength and direction of the linear relationship
between these two continuous variables. Which statistical method is most
appropriate?
A.Chi-square test
B.Pearson correlation coefficient
C.ANOVA
D.Logistic regression
Answer:B.Pearson correlation coefficient
Rationale:Pearson correlation measures strength and direction of linear
relationships between continuous variables.
2.A researcher conducts a study comparing the mean blood pressure of three
different diet groups. The data are normally distributed, and the researcher
wants to determine if at least one group mean differs significantly from the
others.Which statistical test should be used?
A.Independent t-test
B.Paired t-test
C.ANOVA
D.Chi-square test
Answer:C.ANOVA
Rationale:ANOVA compares means across three or more groups.
3.A business analyst wants to test whether customer
satisfaction (satisfied vs. not satisfied) is independent of
,gender (male vs. female). Both variables are categorical.Which test is
most appropriate?
A.Pearson correlation
B.Chi-square test of independence
C.Linear regression
D.Paired t-test
Answer:B.Chi-square test of independence
Rationale:Used for relationships between categorical variables.
4.A researcher calculates a p-value of 0.03 while testing a hypothesis at a
significance level of 0.05. What decision should the researcher make?
A.Fail to reject the null hypothesis
B.Reject the null hypothesis
C.Increase the sample size
D.Accept the alternative hypothesis without testing
Answer:B.Reject the null hypothesis
Rationale:p <alpha (0.05),so results are statistically significant.
5.A student conducts a study and obtains a correlation
coefficient of-0.85 between two variables. How should this result be
interpreted?
A.Weak positive relationship
B.Strong positive relationship
C.Weak negative relationship
D.Strong negative relationship
Answer:D.Strong negative relationship
Rationale: Value close to-1 indicates strong negative correlation.
6. A researcher is analyzing data from a small sample that is not normally
distributed. Which statistical test is most appropriate for comparing two
independent groups?
A.Independent t-test
B.Paired t-test
C.Mann-Whitney U test
D.ANOVA
,Answer:C.Mann-Whitney U test
Rationale: Nonparametric alternative for independent samples.
7.A study reports a Type I error. What does this mean?
A.Failing to reject a false null hypothesis
B.Rejecting a true null hypothesis
C.Accepting both hypotheses
D.Incorrect sample size
Answer: B.Rejecting a true null hypothesis
Rationale: Type I error = false positive.
8. A researcher wants to predict a dependent variable based on one
independent variable. Which method is most appropriate?
A.Correlation
B.Simple linear regression
C.ANOVA
D.Chi-square
Answer: B.Simple linear regression
Rationale: Regression predicts outcomes.
9.A dataset is highly skewed to the right.Which measure of central
tendency is most appropriate?
A.Mean
B.Median
C.Mode
D.Range
Answer:B.Median
Rationale: Median is resistant to skew.
10.A researcher calculates a standard deviation of zero. What does this
indicate?
A.Data is highly variable
B.All values are identical
C.Data is skewed
D.Sample size is small
, Answer: B.All values are identical
Rationale: No variability exists.
11.A study compares pre-test and post-test scores of the same group of
students.Which test should be used?
A.Independent t-test
B.Paired t-test
C.Chi-square
D.ANOVA
Answer:B.Paired t-test
Rationale:Same group measured twice.
12. A researcher uses a confidence interval of 95%. What does this mean?
A.95% of data is correct
B.95% chance parameter is in interval
C.95% of samples will contain true parameter
D.95% of population is sampled
Answer: C. 95% of samples will contain true parameter
Rationale:Interpretation of confidence intervals.
13.A variable is measured as “low, medium, high.”What type of data is this?
A.Nominal
B.Ordinal
C.Interval
D.Ratio
Answer:B.Ordinal
Rationale:Ordered categories.
14.A histogram shows a symmetric bell shape. What does this indicate?
A.Skewed distribution
B. Normal distribution
C.Bimodal distribution
D.Uniform distribution
WGU C207 OA/WGUC207OA FINALEXAM 2026 Final Self Assessment Actual
Questions And Correct Detailed Answers
1. A graduate student is analyzing a dataset to determine whether there is a
statistically significant relationship between study hours and exam scores. The
student wants to measure the strength and direction of the linear relationship
between these two continuous variables. Which statistical method is most
appropriate?
A.Chi-square test
B.Pearson correlation coefficient
C.ANOVA
D.Logistic regression
Answer:B.Pearson correlation coefficient
Rationale:Pearson correlation measures strength and direction of linear
relationships between continuous variables.
2.A researcher conducts a study comparing the mean blood pressure of three
different diet groups. The data are normally distributed, and the researcher
wants to determine if at least one group mean differs significantly from the
others.Which statistical test should be used?
A.Independent t-test
B.Paired t-test
C.ANOVA
D.Chi-square test
Answer:C.ANOVA
Rationale:ANOVA compares means across three or more groups.
3.A business analyst wants to test whether customer
satisfaction (satisfied vs. not satisfied) is independent of
,gender (male vs. female). Both variables are categorical.Which test is
most appropriate?
A.Pearson correlation
B.Chi-square test of independence
C.Linear regression
D.Paired t-test
Answer:B.Chi-square test of independence
Rationale:Used for relationships between categorical variables.
4.A researcher calculates a p-value of 0.03 while testing a hypothesis at a
significance level of 0.05. What decision should the researcher make?
A.Fail to reject the null hypothesis
B.Reject the null hypothesis
C.Increase the sample size
D.Accept the alternative hypothesis without testing
Answer:B.Reject the null hypothesis
Rationale:p <alpha (0.05),so results are statistically significant.
5.A student conducts a study and obtains a correlation
coefficient of-0.85 between two variables. How should this result be
interpreted?
A.Weak positive relationship
B.Strong positive relationship
C.Weak negative relationship
D.Strong negative relationship
Answer:D.Strong negative relationship
Rationale: Value close to-1 indicates strong negative correlation.
6. A researcher is analyzing data from a small sample that is not normally
distributed. Which statistical test is most appropriate for comparing two
independent groups?
A.Independent t-test
B.Paired t-test
C.Mann-Whitney U test
D.ANOVA
,Answer:C.Mann-Whitney U test
Rationale: Nonparametric alternative for independent samples.
7.A study reports a Type I error. What does this mean?
A.Failing to reject a false null hypothesis
B.Rejecting a true null hypothesis
C.Accepting both hypotheses
D.Incorrect sample size
Answer: B.Rejecting a true null hypothesis
Rationale: Type I error = false positive.
8. A researcher wants to predict a dependent variable based on one
independent variable. Which method is most appropriate?
A.Correlation
B.Simple linear regression
C.ANOVA
D.Chi-square
Answer: B.Simple linear regression
Rationale: Regression predicts outcomes.
9.A dataset is highly skewed to the right.Which measure of central
tendency is most appropriate?
A.Mean
B.Median
C.Mode
D.Range
Answer:B.Median
Rationale: Median is resistant to skew.
10.A researcher calculates a standard deviation of zero. What does this
indicate?
A.Data is highly variable
B.All values are identical
C.Data is skewed
D.Sample size is small
, Answer: B.All values are identical
Rationale: No variability exists.
11.A study compares pre-test and post-test scores of the same group of
students.Which test should be used?
A.Independent t-test
B.Paired t-test
C.Chi-square
D.ANOVA
Answer:B.Paired t-test
Rationale:Same group measured twice.
12. A researcher uses a confidence interval of 95%. What does this mean?
A.95% of data is correct
B.95% chance parameter is in interval
C.95% of samples will contain true parameter
D.95% of population is sampled
Answer: C. 95% of samples will contain true parameter
Rationale:Interpretation of confidence intervals.
13.A variable is measured as “low, medium, high.”What type of data is this?
A.Nominal
B.Ordinal
C.Interval
D.Ratio
Answer:B.Ordinal
Rationale:Ordered categories.
14.A histogram shows a symmetric bell shape. What does this indicate?
A.Skewed distribution
B. Normal distribution
C.Bimodal distribution
D.Uniform distribution
