Chapter 3 Practice Exam Questions and
Answers
For the numbers 13, 16, 12, 11, 8, 14, 12 and 18
which of the following is true?
a.
median > mean > mode
b.
mean > mode > median
c.
median > mode > mean
d.
mean > median > mode - correct answer-d.
mean > median > mode
Jason, a freshman at a local college, just completed 15 credit hours. His grade report is
presented below.
Calculus
5
C
Biology
4
A
English
3
D
Music
2
B
P.E.
1
A
A=4,B=3,C=2, D=1 - correct answer-2.6
When Scholastic Achievement Test scores (SATs) are sent to test-takers, the
percentiles associated with scores are also given. Suppose a test-taker scored at the
55th percentile on the verbal part of the test and at the 48th percentile on the
quantitative part. Interpret these results.
a.
This student performed better than 55% of the other test-takers on the verbal part and
better than 52% on the quantitative part.
, b.
This student performed better than 45% of the other test-takers on the verbal part and
better than 52% on the quantitative part.
c.
This student performed better than 45% of the other test-takers on the verbal part and
better than 48% on the quantitative part.
d.
This student performed better than 55% of the other test-takers on the verbal part and
better than 48% on the quantitative part. - correct answer-d.
This student performed better than 55% of the other test-takers on the verbal part and
better than 48% on the quantitative part.
Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25.
Compute the third quartile
a.
27.85
b.
27
c.
28
d.
29.5 - correct answer-d. 29.5
A researcher has collected the following sample data:
5, 15, 18, 10, 8, 12, 16, 10, 6.
The interquartile range is
a. 9
b. 8.5
c.10
d. 9.25 - correct answer-b. 8.5
What is the population standard deviation for the numbers: 75, 83, 96, 100, 121 and
125?.
a.
16.9
b.
17.1
c.
17.6
d.
18.2 - correct answer-d. 18.2
Compute S2 and S for the data set: -3, 1, -2, -3, 1, -4
a.
4; 2
b.
Answers
For the numbers 13, 16, 12, 11, 8, 14, 12 and 18
which of the following is true?
a.
median > mean > mode
b.
mean > mode > median
c.
median > mode > mean
d.
mean > median > mode - correct answer-d.
mean > median > mode
Jason, a freshman at a local college, just completed 15 credit hours. His grade report is
presented below.
Calculus
5
C
Biology
4
A
English
3
D
Music
2
B
P.E.
1
A
A=4,B=3,C=2, D=1 - correct answer-2.6
When Scholastic Achievement Test scores (SATs) are sent to test-takers, the
percentiles associated with scores are also given. Suppose a test-taker scored at the
55th percentile on the verbal part of the test and at the 48th percentile on the
quantitative part. Interpret these results.
a.
This student performed better than 55% of the other test-takers on the verbal part and
better than 52% on the quantitative part.
, b.
This student performed better than 45% of the other test-takers on the verbal part and
better than 52% on the quantitative part.
c.
This student performed better than 45% of the other test-takers on the verbal part and
better than 48% on the quantitative part.
d.
This student performed better than 55% of the other test-takers on the verbal part and
better than 48% on the quantitative part. - correct answer-d.
This student performed better than 55% of the other test-takers on the verbal part and
better than 48% on the quantitative part.
Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25.
Compute the third quartile
a.
27.85
b.
27
c.
28
d.
29.5 - correct answer-d. 29.5
A researcher has collected the following sample data:
5, 15, 18, 10, 8, 12, 16, 10, 6.
The interquartile range is
a. 9
b. 8.5
c.10
d. 9.25 - correct answer-b. 8.5
What is the population standard deviation for the numbers: 75, 83, 96, 100, 121 and
125?.
a.
16.9
b.
17.1
c.
17.6
d.
18.2 - correct answer-d. 18.2
Compute S2 and S for the data set: -3, 1, -2, -3, 1, -4
a.
4; 2
b.
