ISSCM FINAL EXAM REVIEW QUESTIONS AND CORRECT ANSWERS
100% VERIFIED 2026 UPDATE!!
The interquartile range (IQR) encompasses what percent of the observations?
a. lower 25%
b. middle 50%
c. upper 75%
d. upper 90% - (answer)B
Which statement is true for the following data values: 7, 5, 6, 4, 7, 8, and 12?
a. The mean, median, and mode are all equal.
b. Only the mean and median are equal.
c. Only the mean and mode are equal.
d. Only the median and mode are equal. - (answer)A
A sample of 15 children shows their favorite restaurants:
McDonalds Friday's Pizza Hut
Mellow Mushroom McDonalds
Luppi's McDonalds Taco Bell
Luppi's Friday's Mellow Mushroom
McDonalds McDonalds Pizza Hut
McDonalds
Which of the following is the correct relative frequency for McDonalds?
a. 0.27 b. 0.5 c. 0.4 d. 0.6 - (answer)C
Expressed in percentiles, the interquartile range (IQR) is the difference between the:
a. 10th and 60th percentiles b. 15th and 65th percentiles c. 20th and 70th percentiles d. 25th and 75th
percentiles - (answer)D
,ISSCM FINAL EXAM REVIEW QUESTIONS AND CORRECT ANSWERS
100% VERIFIED 2026 UPDATE!!
A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations
from the sample mean (∑(𝑥𝑖 − 𝑥̅)2) is:
a. 400 b. 320 c. 304 d. 288 - (answer)C
The median of a sample will always equal the
a. (Q1 + Q3)/2
b. Q4/2
c. 50th percentile
d. (smallest value + largest value)/2. - (answer)C
The pth percentile is a value such that approximately
a. p percent of the observations are less than the value and (100 - p) percent are more than this value.
b. p percent of the observations are less than the value and p percent are more than this value.
c. (100 - p) percent of the observations are less than the value and p percent are more than this value.
d. (100 - p) percent of the observations are less than the value and (100 - p) percent are more than this
value. - (answer)A
The first quartile
a. contains at least one third of the data elements.
b. is the same as the 25th percentile.
c. is the same as the 50th percentile.
, ISSCM FINAL EXAM REVIEW QUESTIONS AND CORRECT ANSWERS
100% VERIFIED 2026 UPDATE!!
d. is the same as the 75th percentile. - (answer)B
When data are positively skewed, the mean will usually be
a. greater than the median.
b. smaller than the median.
c. equal to the median.
d. positive. - (answer)A
If the correlation coefficient (rxy) between two variables x and y is -0.9873, this indicates that
a. there is a weak negative correlation between x and y.
b. there is a weak positive correlation between x and y.
c. there is a strong negative correlation between x and y.
d. there is a strong positive correlation between x and y. - (answer)C
The variance of a sample was reported to be 144. The report indicated that ∑(𝑥𝑖 − 𝑥̅)2 =
7200. What is the sample size?
a. 49 b. 50 c. 51 d. 52 - (answer)C
Generally, which one of the following is the least appropriate measure of central tendency for a data set
that contains outliers?
a. Mean
b. Median
c. 2nd quartile
d. 50th percentile - (answer)A
100% VERIFIED 2026 UPDATE!!
The interquartile range (IQR) encompasses what percent of the observations?
a. lower 25%
b. middle 50%
c. upper 75%
d. upper 90% - (answer)B
Which statement is true for the following data values: 7, 5, 6, 4, 7, 8, and 12?
a. The mean, median, and mode are all equal.
b. Only the mean and median are equal.
c. Only the mean and mode are equal.
d. Only the median and mode are equal. - (answer)A
A sample of 15 children shows their favorite restaurants:
McDonalds Friday's Pizza Hut
Mellow Mushroom McDonalds
Luppi's McDonalds Taco Bell
Luppi's Friday's Mellow Mushroom
McDonalds McDonalds Pizza Hut
McDonalds
Which of the following is the correct relative frequency for McDonalds?
a. 0.27 b. 0.5 c. 0.4 d. 0.6 - (answer)C
Expressed in percentiles, the interquartile range (IQR) is the difference between the:
a. 10th and 60th percentiles b. 15th and 65th percentiles c. 20th and 70th percentiles d. 25th and 75th
percentiles - (answer)D
,ISSCM FINAL EXAM REVIEW QUESTIONS AND CORRECT ANSWERS
100% VERIFIED 2026 UPDATE!!
A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations
from the sample mean (∑(𝑥𝑖 − 𝑥̅)2) is:
a. 400 b. 320 c. 304 d. 288 - (answer)C
The median of a sample will always equal the
a. (Q1 + Q3)/2
b. Q4/2
c. 50th percentile
d. (smallest value + largest value)/2. - (answer)C
The pth percentile is a value such that approximately
a. p percent of the observations are less than the value and (100 - p) percent are more than this value.
b. p percent of the observations are less than the value and p percent are more than this value.
c. (100 - p) percent of the observations are less than the value and p percent are more than this value.
d. (100 - p) percent of the observations are less than the value and (100 - p) percent are more than this
value. - (answer)A
The first quartile
a. contains at least one third of the data elements.
b. is the same as the 25th percentile.
c. is the same as the 50th percentile.
, ISSCM FINAL EXAM REVIEW QUESTIONS AND CORRECT ANSWERS
100% VERIFIED 2026 UPDATE!!
d. is the same as the 75th percentile. - (answer)B
When data are positively skewed, the mean will usually be
a. greater than the median.
b. smaller than the median.
c. equal to the median.
d. positive. - (answer)A
If the correlation coefficient (rxy) between two variables x and y is -0.9873, this indicates that
a. there is a weak negative correlation between x and y.
b. there is a weak positive correlation between x and y.
c. there is a strong negative correlation between x and y.
d. there is a strong positive correlation between x and y. - (answer)C
The variance of a sample was reported to be 144. The report indicated that ∑(𝑥𝑖 − 𝑥̅)2 =
7200. What is the sample size?
a. 49 b. 50 c. 51 d. 52 - (answer)C
Generally, which one of the following is the least appropriate measure of central tendency for a data set
that contains outliers?
a. Mean
b. Median
c. 2nd quartile
d. 50th percentile - (answer)A
