WGU C784 - Review Tests - 4,5,6,7 questions with
verified answers
.Incorrect. The correct answer is d. Range is one example of a measure of spread.
Ans✓✓✓ 18) Which of the following best describes a measure of spread?
a) Day of the week with the most doctors on staff at BMC.
b) The average number of beds in the ICU wards of a random sample of 15
hospitals
c) Live births in 2014 performed by midwives.
d) Range of birth-weight for babies delivered in 2013.
Correct. The answer is a. This statement is true; the presence of outliers can skew
measures of correlation. Ans✓✓✓ 12) The presence of outliers can cause
measures of correlation to be skewed.
a) True
b) False
Correct. The answer is b. A histogram is a graph that displays continuous data.
Histograms measure how continuous data is distributed over various ranges.
Ans✓✓✓ 9) Which of the following would be the best option to graphically
display continuous data?
a) Bar Chart
b) Histogram
c) Pie Chart
d) Box Plot
, Correct. The answer is b. An outlier is a data point that is significantly distant from
other data points in the data set. Ans✓✓✓ 11) A data point that is significantly
distant from the other data points in the data set is called:
a) An anomaly
b) An outlier
c) An outsider
d) An original
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 | 125 128 135 140 152 159 160 165 169 17978 85 87
90 100 105 115 117 123 125 | 125 128 135 140 152 159 160 165 169 179To find
the third quartile (Q3Q3) identify the median of the upper 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 upper half of the data set falls between 152152 and
159159. Therefore the third
quartile(Q3Q3)=(152+159)2=155.5=(152+159)2=155.5 Ans✓✓✓ 8) What is the
third quartile (Q3) of this data set?
a) 152
b) 155.5
c) 157
d) 159
Correct. The answer is b. This is a false statement. According to The Empirical
Rule, approximately 68% of the data points in a dataset will be within 11 standard
deviation of the mean. 95% of all values are within 2 standard deviations of the
mean. Ans✓✓✓ 12) About 95 percent of results in a normal distribution fall
between one standard deviation below the mean and one standard deviation
above the mean. True or False?
verified answers
.Incorrect. The correct answer is d. Range is one example of a measure of spread.
Ans✓✓✓ 18) Which of the following best describes a measure of spread?
a) Day of the week with the most doctors on staff at BMC.
b) The average number of beds in the ICU wards of a random sample of 15
hospitals
c) Live births in 2014 performed by midwives.
d) Range of birth-weight for babies delivered in 2013.
Correct. The answer is a. This statement is true; the presence of outliers can skew
measures of correlation. Ans✓✓✓ 12) The presence of outliers can cause
measures of correlation to be skewed.
a) True
b) False
Correct. The answer is b. A histogram is a graph that displays continuous data.
Histograms measure how continuous data is distributed over various ranges.
Ans✓✓✓ 9) Which of the following would be the best option to graphically
display continuous data?
a) Bar Chart
b) Histogram
c) Pie Chart
d) Box Plot
, Correct. The answer is b. An outlier is a data point that is significantly distant from
other data points in the data set. Ans✓✓✓ 11) A data point that is significantly
distant from the other data points in the data set is called:
a) An anomaly
b) An outlier
c) An outsider
d) An original
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 | 125 128 135 140 152 159 160 165 169 17978 85 87
90 100 105 115 117 123 125 | 125 128 135 140 152 159 160 165 169 179To find
the third quartile (Q3Q3) identify the median of the upper 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 upper half of the data set falls between 152152 and
159159. Therefore the third
quartile(Q3Q3)=(152+159)2=155.5=(152+159)2=155.5 Ans✓✓✓ 8) What is the
third quartile (Q3) of this data set?
a) 152
b) 155.5
c) 157
d) 159
Correct. The answer is b. This is a false statement. According to The Empirical
Rule, approximately 68% of the data points in a dataset will be within 11 standard
deviation of the mean. 95% of all values are within 2 standard deviations of the
mean. Ans✓✓✓ 12) About 95 percent of results in a normal distribution fall
between one standard deviation below the mean and one standard deviation
above the mean. True or False?
