1|Page
C784 - Review Tests - 4,5,6,7 Questions and Answers with 100%
Complete Solutions UPDATED!!!
The correct answer is c. This histogram reveals a distribution
that is positively skewed as the long tail of the graph is to the
right of the peak.
a) Normal
b) Negatively Skewed
c) Positively Skewed
d) Cannot determine
The answer is c. Use the Empirical Rule to determine that
95%95% of the diastolic blood pressure values will be within
two standard deviations of the mean.
Therefore, the upper limit will be:
65.3+2(11.3)=65.3+22.6=87.965.3+2(11.3)=65.3+22.6=87.9
And the lower limit will be:
65.3−2(11.3)=65.3−22.6=42.765.3-2(11.3)=65.3-22.6=42.7
Therefore, 95%95% of the diastolic blood pressures will be
between 42.742.7 mm Hg and 87.987.9 mm Hg.
2)Adult diastolic blood pressures are normally distributed. The
mean is 65.3 mm Hg and the standard deviation is 11.3 mm Hg.
What values would 95%95% of the data fall between?
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a) 47.2 and 89.7
b) 42.2 and 86.9
c) 42.7 and 87.9
d) 41.6 and 86.8
The answer is b. The Standard Deviation Rule says that 68% of
the values will fall within 11 standard deviation of the mean.
3) Assuming that adult diastolic blood pressures are normally
distributed, what is the approximate percentage of adults who
have diastolic blood pressures within 11 standard deviation of
the mean, or between 54.0mm Hg and 76.6 mm Hg?
a) 50%
b) 68%
c) 95.4%
d) 99.7%
The answer is d. The range is the difference between the
smallest and greatest values (maximum and minimum) of a
data set. The minimum value is 48; the maximum is 84. 84 -48 =
36
4) What is the range of the following data set?
a) 26
b) 28
, 3|Page
c) 32
d) 36
The answer is a. To find the mean, the first step is to add all of
the values together. Then divide that sum (784) by the number
of values in the data set (12) . 78/412=65.3
5) What is the mean of the following data set?
a) 65.3
b) 69.2
c) 61.6
d) 64.4
The answer is c. As there are an even number of data points in
this data set, the median is half-way between 125 and 125.
Therefore, the second quartile (Q2), also called the median,
=125.
6) What is second quartile (Q2Q2) of this data set?
a) 123
b) 124
c) 125
d) 125.5
The answer is d. Find the median, or mid-point, of the data
set:78 85 87 90 100 105 115 117 123 125 | 125 128 135 140
C784 - Review Tests - 4,5,6,7 Questions and Answers with 100%
Complete Solutions UPDATED!!!
The correct answer is c. This histogram reveals a distribution
that is positively skewed as the long tail of the graph is to the
right of the peak.
a) Normal
b) Negatively Skewed
c) Positively Skewed
d) Cannot determine
The answer is c. Use the Empirical Rule to determine that
95%95% of the diastolic blood pressure values will be within
two standard deviations of the mean.
Therefore, the upper limit will be:
65.3+2(11.3)=65.3+22.6=87.965.3+2(11.3)=65.3+22.6=87.9
And the lower limit will be:
65.3−2(11.3)=65.3−22.6=42.765.3-2(11.3)=65.3-22.6=42.7
Therefore, 95%95% of the diastolic blood pressures will be
between 42.742.7 mm Hg and 87.987.9 mm Hg.
2)Adult diastolic blood pressures are normally distributed. The
mean is 65.3 mm Hg and the standard deviation is 11.3 mm Hg.
What values would 95%95% of the data fall between?
,2|Page
a) 47.2 and 89.7
b) 42.2 and 86.9
c) 42.7 and 87.9
d) 41.6 and 86.8
The answer is b. The Standard Deviation Rule says that 68% of
the values will fall within 11 standard deviation of the mean.
3) Assuming that adult diastolic blood pressures are normally
distributed, what is the approximate percentage of adults who
have diastolic blood pressures within 11 standard deviation of
the mean, or between 54.0mm Hg and 76.6 mm Hg?
a) 50%
b) 68%
c) 95.4%
d) 99.7%
The answer is d. The range is the difference between the
smallest and greatest values (maximum and minimum) of a
data set. The minimum value is 48; the maximum is 84. 84 -48 =
36
4) What is the range of the following data set?
a) 26
b) 28
, 3|Page
c) 32
d) 36
The answer is a. To find the mean, the first step is to add all of
the values together. Then divide that sum (784) by the number
of values in the data set (12) . 78/412=65.3
5) What is the mean of the following data set?
a) 65.3
b) 69.2
c) 61.6
d) 64.4
The answer is c. As there are an even number of data points in
this data set, the median is half-way between 125 and 125.
Therefore, the second quartile (Q2), also called the median,
=125.
6) What is second quartile (Q2Q2) of this data set?
a) 123
b) 124
c) 125
d) 125.5
The answer is d. Find the median, or mid-point, of the data
set:78 85 87 90 100 105 115 117 123 125 | 125 128 135 140
