13.
What is the mean for the following scores: 2, 5, 4, 1, 8?
A.
3
B.
4
C.
5
D.
20
14.
What is the mean for the scores shown in the frequency distribution?
A.
1.5
B.
3.0
C.
2.9
D.
5.8
15.
What is the median for the following scores: 2, 5, 4, 1, 8?
A.
3.5
B.
4
C.
4.5
D.
7
16.
A teacher gave a statistics test to a class of Geography students and computed the measures
of central tendency for the test scores. Which of the following statements cannot be an
accurate description of the scores?
A.
The majority of students had scores above the mean.
B.
The majority of students had scores above the median.
C.
The majority of students had scores above the mode.
D.
All of the above options (A, B and C) are false statements.
17.
Which of the following sets of scores has the greatest variability ( range)?
A.
2, 5, 8, 11
B.
13, 13, 13, 13
C.
20, 25, 26 ,27
D.
42, 43, 44, 45
18.
Which of the following statements is the most accurate description for the concept of
standard deviation?
A.
The total distance from the smallest score to the highest score.
B.
The square root of the total distance from the smallest score to the highest score.
C.
The squared average distance between all scores and the mean.
D.
The average distance between a score and the mean.
19.
What is the variance for the following set of scores: 2, 2, 2, 2, 2.
A.
0
B.
2
C.
4
D.
25
Value
f
1
1
2
3
3
3
4
2
5
1