NURS 372 EXAM 3 QUESTIONS & ANSWERS
To describe the frequency of the single variable myocardial infarction in adults ages 30-
49, which of the following could be used? (Select all that apply)
a) Descriptive Statistics
b) Inferential Statistics
c) Univariate Analysis
d) Bivariate Analysis - Answers -a) Descriptive Statistics
c) Univariate Analysis
Frequency distributions are an effective way to present inferential statistics
(True or False) - Answers -False
Categories in grouped data must be mutually exclusive
(True or False) - Answers -True
Percentages are often used to describe characteristics of samples
(True or False) - Answers -True
The total number of subjects in a sample is represented by the symbol n
(True or False) - Answers -False
The most frequent data value in a set of data is the:
a) Mean
b) Median
c) Mode
d) Average - Answers -c) Mode
When data have no outliers, researchers prefer to report the:
a) Mean
b) Median
c) Mode
d) Magnitude - Answers -a) Mean
If the tail of a distribution is skewed to the left, the data are negatively skewed
(True or False) - Answers -True
, If a normal distribution, the mean, median, and mode are the same value
(True or False) - Answers -True
If data are highly uniform, a low peak will be observed in a graphic representation of the
data
(True or False) - Answers -False
What is range? - Answers -The difference between maximum and minimum values
What is Semiquartile Range? - Answers -Range of the middle 50% of data
What is Percentile? - Answers -Rank
What is Standard Deviation? - Answers -Measure of the average deviations of a value
from the mean
What is a Z Score? - Answers -Converted standard deviation to a standardized unit
What is a Coefficient of Variation? - Answers -Percentage comparing standard
deviations when units of measure are different
Inferential statistical tests are used to: (Select all that apply)
a) Make assumptions about the population
b) Describe the sample with means and standard deviations
c) Test hypotheses by asking if there are differences between the groups
d) Select a sample
e) Determine whether results occurred by chance - Answers -a. Make assumptions
about the population
c. Test hypotheses by asking if there are differences between the groups
e. Determine whether results occurred by chance
When a researcher accepts the null hypothesis when it really should have been
rejected, the researcher:
(Select all that apply)
a) Committed a type I error
b) Committed a type II error
c) Obtained significant results
d) Obtained non-significant results - Answers -b) Committed a type II error
d) Obtained non-significant results
The most commonly used alpha level in nursing research is:
To describe the frequency of the single variable myocardial infarction in adults ages 30-
49, which of the following could be used? (Select all that apply)
a) Descriptive Statistics
b) Inferential Statistics
c) Univariate Analysis
d) Bivariate Analysis - Answers -a) Descriptive Statistics
c) Univariate Analysis
Frequency distributions are an effective way to present inferential statistics
(True or False) - Answers -False
Categories in grouped data must be mutually exclusive
(True or False) - Answers -True
Percentages are often used to describe characteristics of samples
(True or False) - Answers -True
The total number of subjects in a sample is represented by the symbol n
(True or False) - Answers -False
The most frequent data value in a set of data is the:
a) Mean
b) Median
c) Mode
d) Average - Answers -c) Mode
When data have no outliers, researchers prefer to report the:
a) Mean
b) Median
c) Mode
d) Magnitude - Answers -a) Mean
If the tail of a distribution is skewed to the left, the data are negatively skewed
(True or False) - Answers -True
, If a normal distribution, the mean, median, and mode are the same value
(True or False) - Answers -True
If data are highly uniform, a low peak will be observed in a graphic representation of the
data
(True or False) - Answers -False
What is range? - Answers -The difference between maximum and minimum values
What is Semiquartile Range? - Answers -Range of the middle 50% of data
What is Percentile? - Answers -Rank
What is Standard Deviation? - Answers -Measure of the average deviations of a value
from the mean
What is a Z Score? - Answers -Converted standard deviation to a standardized unit
What is a Coefficient of Variation? - Answers -Percentage comparing standard
deviations when units of measure are different
Inferential statistical tests are used to: (Select all that apply)
a) Make assumptions about the population
b) Describe the sample with means and standard deviations
c) Test hypotheses by asking if there are differences between the groups
d) Select a sample
e) Determine whether results occurred by chance - Answers -a. Make assumptions
about the population
c. Test hypotheses by asking if there are differences between the groups
e. Determine whether results occurred by chance
When a researcher accepts the null hypothesis when it really should have been
rejected, the researcher:
(Select all that apply)
a) Committed a type I error
b) Committed a type II error
c) Obtained significant results
d) Obtained non-significant results - Answers -b) Committed a type II error
d) Obtained non-significant results
The most commonly used alpha level in nursing research is:
