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APPLIED EPIDEMIOLOGY AND BIOSTATISTICS
MIDTERM 522 RUSH TEST 2025 BRAND NEW
ACTUAL EXAM WITH ANSWERS.
When comparing hemoglobin A1C measurements that are
normally distributed with no outliers in 2 independent groups, the
researcher should use which of the following tests?
a. Independent t-test
b. Fisher Exact Test
c. Pearson correlation coefficient - correct answer -a. Independent
t-test
Which of the following are parametric tests? SELECT ALL THAT
APPLY
a. Repeated measures ANOVA
b. Paired t-test
c. Pearson Correlation coefficient - correct answer -a,b,c
Which of the following can be determined from a Spearman
correlation coefficient and its associated p-value? SELECT ALL
THAT APPLY
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a. Statistical significance
b. Strength of the relationship
c. Direction of the relationship - correct answer -a,b,c
A researcher studies the relationship between hours of television
watching and BMI. The correlation coefficient is -0.35, which
indicates - correct answer -a moderate negative/inverse
relationship
When comparing a ratio level variable that is normally distributed
and without outliers in 3 different groups of patients, which
statistical test should be used? - correct answer -One-way
ANOVA
A Pearson correlation coefficient is 0.04. This correlation indicates
that there is - correct answer -A very weak relationship between
the variables.
The best test to use when testing for a relationship between 2
dichotomous, independent variables would be a - correct answer -
Fisher Exact test
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A researcher studies the relationship between the number of
minutes of breast pumping and the amount of milk produced per
day in mothers of preterm infants. The R-squared value is 0.49.
This finding means that: - correct answer -The number of minutes
of pumping explains 49% of the variable in milk output.
T/F: Parametric tests can be used to analyze ordinal variables but
not nominal variables. - correct answer -False
A researcher is comparing the outcome variable of cost in US
dollars in 3 independent groups. The data are normally distributed
without outliers. The researcher should use which of the following
tests to compare the 3 groups? - correct answer -One-Way Anova
A r-value of 0.33 indicates - correct answer -A moderate
relationship between the variables.
When comparing pain scores measured on a scale from 1 to 10 in
the same patients before and after receiving a new pain
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medications, the researcher should use which test? - correct
answer -A Wilcoxon signed-rank test.
When testing for a relationship between 2 independent, nominal
variables, the best test to use would be a/an
a. Independent t-test.
b. Pearson correlation coefficient.
c. Chi-square test.
d. Spearman correlation coefficient. - correct answer -c. Chi-
square test.
T/F: Pearson correlation coefficients can be positive or negative. -
correct answer -True
Regression - correct answer -A statistical technique to quantify
associations and begin the process of explaining or predicting
events
APPLIED EPIDEMIOLOGY AND BIOSTATISTICS
MIDTERM 522 RUSH TEST 2025 BRAND NEW
ACTUAL EXAM WITH ANSWERS.
When comparing hemoglobin A1C measurements that are
normally distributed with no outliers in 2 independent groups, the
researcher should use which of the following tests?
a. Independent t-test
b. Fisher Exact Test
c. Pearson correlation coefficient - correct answer -a. Independent
t-test
Which of the following are parametric tests? SELECT ALL THAT
APPLY
a. Repeated measures ANOVA
b. Paired t-test
c. Pearson Correlation coefficient - correct answer -a,b,c
Which of the following can be determined from a Spearman
correlation coefficient and its associated p-value? SELECT ALL
THAT APPLY
, Page | 2
a. Statistical significance
b. Strength of the relationship
c. Direction of the relationship - correct answer -a,b,c
A researcher studies the relationship between hours of television
watching and BMI. The correlation coefficient is -0.35, which
indicates - correct answer -a moderate negative/inverse
relationship
When comparing a ratio level variable that is normally distributed
and without outliers in 3 different groups of patients, which
statistical test should be used? - correct answer -One-way
ANOVA
A Pearson correlation coefficient is 0.04. This correlation indicates
that there is - correct answer -A very weak relationship between
the variables.
The best test to use when testing for a relationship between 2
dichotomous, independent variables would be a - correct answer -
Fisher Exact test
, Page | 3
A researcher studies the relationship between the number of
minutes of breast pumping and the amount of milk produced per
day in mothers of preterm infants. The R-squared value is 0.49.
This finding means that: - correct answer -The number of minutes
of pumping explains 49% of the variable in milk output.
T/F: Parametric tests can be used to analyze ordinal variables but
not nominal variables. - correct answer -False
A researcher is comparing the outcome variable of cost in US
dollars in 3 independent groups. The data are normally distributed
without outliers. The researcher should use which of the following
tests to compare the 3 groups? - correct answer -One-Way Anova
A r-value of 0.33 indicates - correct answer -A moderate
relationship between the variables.
When comparing pain scores measured on a scale from 1 to 10 in
the same patients before and after receiving a new pain
, Page | 4
medications, the researcher should use which test? - correct
answer -A Wilcoxon signed-rank test.
When testing for a relationship between 2 independent, nominal
variables, the best test to use would be a/an
a. Independent t-test.
b. Pearson correlation coefficient.
c. Chi-square test.
d. Spearman correlation coefficient. - correct answer -c. Chi-
square test.
T/F: Pearson correlation coefficients can be positive or negative. -
correct answer -True
Regression - correct answer -A statistical technique to quantify
associations and begin the process of explaining or predicting
events
