C784 – Review Tests 4, 5, 6 & 7 | Complete Practice Questions, Study Guide
& Exam Review
1. The correct answer is c. This histogram reveals a distribution that is positive-
ly sкewed as the long tail of the graph is to the right of the peaк.:a) Normal
b) Negatively Sкewed
c) Positively Sкewed
d) Cannot determine
2. 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?
a) 47.2 and 89.7
b) 42.2 and 86.9
c) 42.7 and 87.9
d) 41.6 and 86.8
3. 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%
4. 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
, C784 – Review Tests 4, 5, 6 & 7 | Complete Practice Questions, Study Guide
& Exam Review
b) 28
c) 32
d) 36
5. 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
6. 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
7. The answer is d. Find the median, or mid-point, of the data set:78 85 87 90
100 105 115 117 123 125 | 125 128 135 140 152 159 160 165 169 17978 85
87 90 100 105 115 117 123 125 | 125 128 135 140 152 159 160 165 169 179To
find the first quartile (Q1Q1) identify the median of the lower half of the data
set:78 85 87 90 100 | 105 115 117 123 125 | 125 128 135 140 152 159 160 165
169 17978 85 87 90 100 | 105 115 117 123 125 | 125 128 135 140 152 159 160
165 169 179The median of the lower half of the data set falls bet ween 100100
and 105105. Therefore the first quartile(Q1Q1) =(100+105)2=102.5: 7) What is the
first quartile (Q1Q1) of this data set?
a) 100
b) 103.5
c) 105
d) 102.5
8. Correct. The answer is b. Find the median, or mid-point, of the data set:78
85 87 90 100 105 115 117 123 125 | 125 128 135 140 152 159 160 165
& Exam Review
1. The correct answer is c. This histogram reveals a distribution that is positive-
ly sкewed as the long tail of the graph is to the right of the peaк.:a) Normal
b) Negatively Sкewed
c) Positively Sкewed
d) Cannot determine
2. 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?
a) 47.2 and 89.7
b) 42.2 and 86.9
c) 42.7 and 87.9
d) 41.6 and 86.8
3. 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%
4. 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
, C784 – Review Tests 4, 5, 6 & 7 | Complete Practice Questions, Study Guide
& Exam Review
b) 28
c) 32
d) 36
5. 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
6. 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
7. The answer is d. Find the median, or mid-point, of the data set:78 85 87 90
100 105 115 117 123 125 | 125 128 135 140 152 159 160 165 169 17978 85
87 90 100 105 115 117 123 125 | 125 128 135 140 152 159 160 165 169 179To
find the first quartile (Q1Q1) identify the median of the lower half of the data
set:78 85 87 90 100 | 105 115 117 123 125 | 125 128 135 140 152 159 160 165
169 17978 85 87 90 100 | 105 115 117 123 125 | 125 128 135 140 152 159 160
165 169 179The median of the lower half of the data set falls bet ween 100100
and 105105. Therefore the first quartile(Q1Q1) =(100+105)2=102.5: 7) What is the
first quartile (Q1Q1) of this data set?
a) 100
b) 103.5
c) 105
d) 102.5
8. Correct. The answer is b. Find the median, or mid-point, of the data set:78
85 87 90 100 105 115 117 123 125 | 125 128 135 140 152 159 160 165
