CSUF Practice Questions Chapter 3 Quiz
ISDS 361A Skordi UPDATED Study Guide
QUESTIONS AND CORRECT ANSWERS
-Which of the following symbols represents the size of the
population?
Select one:
a. σ2
b. σ
c. μ
d. N - CORRECT ANSWERS d. N
A researcher has collected the following sample data. The mean of the
sample is 5.
3 5 12 3 2
The standard deviation is
Select one:
a. 8.944.
b. 16.5.
c. 13.2.
d. 4.062. - CORRECT ANSWERS d. 4.062.
A researcher has collected the following sample data. The mean of the
sample is 5.
, 3 5 12 3 2
The interquartile range is
Select one:
a. 9.
b. 6.
c. 2.
d. 2.25. - CORRECT ANSWERS b. 6.
If two groups of numbers have the same mean, then
Select one:
a. their medians must also be equal.
b. other measures of location need not be the same.
c. their standard deviations must also be equal.
d. their modes must also be equal. - CORRECT ANSWERS b.
other measures of location need not be the same.
The 50th percentile is the
Select one:
a. mean.
b. third quartile.
c. median.
d. mode. - CORRECT ANSWERS c. median.
ISDS 361A Skordi UPDATED Study Guide
QUESTIONS AND CORRECT ANSWERS
-Which of the following symbols represents the size of the
population?
Select one:
a. σ2
b. σ
c. μ
d. N - CORRECT ANSWERS d. N
A researcher has collected the following sample data. The mean of the
sample is 5.
3 5 12 3 2
The standard deviation is
Select one:
a. 8.944.
b. 16.5.
c. 13.2.
d. 4.062. - CORRECT ANSWERS d. 4.062.
A researcher has collected the following sample data. The mean of the
sample is 5.
, 3 5 12 3 2
The interquartile range is
Select one:
a. 9.
b. 6.
c. 2.
d. 2.25. - CORRECT ANSWERS b. 6.
If two groups of numbers have the same mean, then
Select one:
a. their medians must also be equal.
b. other measures of location need not be the same.
c. their standard deviations must also be equal.
d. their modes must also be equal. - CORRECT ANSWERS b.
other measures of location need not be the same.
The 50th percentile is the
Select one:
a. mean.
b. third quartile.
c. median.
d. mode. - CORRECT ANSWERS c. median.
