1|Page
Applied Epidemiology and Biostats Final Exam 2025
Test Bank With 300 Questions And 100% Correct
Answers/ Nsg 522 Final Exam 2025 Prep (Rush
University)
T/F: If the correlation coefficient between IQ scores and
SAT scores is r=0.95 , it indicates that higher IQ scores
cause higher SAT scores, implaing a cause-effect
relationship - ...ANSWER...✓✓False
- Correlation does not = cause/effect
Which of the following measures is used to describe the
center or typical value of a data set?
- variance
- mean
- range
- SD - ...ANSWER...✓✓Mean
What does a boxplot primarily illustrate about a dataset?
- the shape of the data
- the spread of variability of the data
- the distribution of the data
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- the central tendency of the data - ...ANSWER...✓✓The
spread of variability of the data
If statistical power is higher, what is the likelihood of
rejecting a null hypothesis if it is indeed false?
- about the same
- lower (less likely)
- higher (more likely)
-Insufficient information to determine - ...ANSWER...✓✓-
higher (more likely)
- If statistical power is higher, it has a higher likelihood to
detect
A set (range) of values calculated from sample data
which is likely to contain the true value of the parameter
with a certain probability, this is know as:
- confidence limits
- level of confidence
- interval estimate
- point estimate - ...ANSWER...✓✓Interval estimate
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The statement 'younger children attending schools in DFW
will learn a second language faster than older children'
represents which type of hypothesis?
- null hypothesis
- two-tailed hypothesis
- not a hypothesis
- one-tailed hypothesis - ...ANSWER...✓✓One-tailed
hypothesis
*null=no direction*
T/F: a statistically significant result indicate it is clinically
or practically meaningful. - ...ANSWER...✓✓False
One problem with hypothesis testing is that a real effect
may not be detected. This problem is most likely to occur
when:
- the effect is large and sample size is large
- the effect size is small and sample size is small
- the effect size is small and sample size is large
- the effect is large and sample size is small -
...ANSWER...✓✓The effect size is small and sample size is
small
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- Small power= small effect size
A health study investigates the average weekly exercise
duration among college students. Data collected from a
sample of 200 students reveals an average exercise time
of 150 minutes per week. The standard deviation of the
sample is 30 minutes, and the margin of error for the 95%
confidence interval is 10 minutes. Which of the following
represent the correct 95% confidence interval for the
average weekly exercise duration
- 120 to 180 mins
- 150 to 160 mins
- 130 to 170 mins
- 140 to 160 mins - ...ANSWER...✓✓140 to 160 mins
*Mean +/- margin of error*
In a clinical trial to compare the effectiveness of two
medications, drug A and drug B, on reducing blood
pressure the observed results are:
Drug A: mean decrease in blood pressure= 15 mg, 95%
confidence interval= 10 to 20 mg
Drug B: Mean decrease in blood pressure= 10 mg, 95%
confidence interval= 5 to 15 mg
Applied Epidemiology and Biostats Final Exam 2025
Test Bank With 300 Questions And 100% Correct
Answers/ Nsg 522 Final Exam 2025 Prep (Rush
University)
T/F: If the correlation coefficient between IQ scores and
SAT scores is r=0.95 , it indicates that higher IQ scores
cause higher SAT scores, implaing a cause-effect
relationship - ...ANSWER...✓✓False
- Correlation does not = cause/effect
Which of the following measures is used to describe the
center or typical value of a data set?
- variance
- mean
- range
- SD - ...ANSWER...✓✓Mean
What does a boxplot primarily illustrate about a dataset?
- the shape of the data
- the spread of variability of the data
- the distribution of the data
,2|Page
- the central tendency of the data - ...ANSWER...✓✓The
spread of variability of the data
If statistical power is higher, what is the likelihood of
rejecting a null hypothesis if it is indeed false?
- about the same
- lower (less likely)
- higher (more likely)
-Insufficient information to determine - ...ANSWER...✓✓-
higher (more likely)
- If statistical power is higher, it has a higher likelihood to
detect
A set (range) of values calculated from sample data
which is likely to contain the true value of the parameter
with a certain probability, this is know as:
- confidence limits
- level of confidence
- interval estimate
- point estimate - ...ANSWER...✓✓Interval estimate
,3|Page
The statement 'younger children attending schools in DFW
will learn a second language faster than older children'
represents which type of hypothesis?
- null hypothesis
- two-tailed hypothesis
- not a hypothesis
- one-tailed hypothesis - ...ANSWER...✓✓One-tailed
hypothesis
*null=no direction*
T/F: a statistically significant result indicate it is clinically
or practically meaningful. - ...ANSWER...✓✓False
One problem with hypothesis testing is that a real effect
may not be detected. This problem is most likely to occur
when:
- the effect is large and sample size is large
- the effect size is small and sample size is small
- the effect size is small and sample size is large
- the effect is large and sample size is small -
...ANSWER...✓✓The effect size is small and sample size is
small
, 4|Page
- Small power= small effect size
A health study investigates the average weekly exercise
duration among college students. Data collected from a
sample of 200 students reveals an average exercise time
of 150 minutes per week. The standard deviation of the
sample is 30 minutes, and the margin of error for the 95%
confidence interval is 10 minutes. Which of the following
represent the correct 95% confidence interval for the
average weekly exercise duration
- 120 to 180 mins
- 150 to 160 mins
- 130 to 170 mins
- 140 to 160 mins - ...ANSWER...✓✓140 to 160 mins
*Mean +/- margin of error*
In a clinical trial to compare the effectiveness of two
medications, drug A and drug B, on reducing blood
pressure the observed results are:
Drug A: mean decrease in blood pressure= 15 mg, 95%
confidence interval= 10 to 20 mg
Drug B: Mean decrease in blood pressure= 10 mg, 95%
confidence interval= 5 to 15 mg
