Question about Statistics Multiple Choice Questions

Extracted Content from Question Files:

Question 1 Multiple Choice
W hich of the following divides a group of data into four subgroups?

quartiles
percentiles
standard deviation
median
Question 2 Multiple Choice
If the standard deviation of a population is 9, the population variance is:

3
9
21.35
81
Question 3 Multiple Choice
W hat is the median for the following numbers?

83
54
48
60
Question 4 Multiple Choice
W hich of the following is not a measure of central tendency?

percentile
quartile
standard deviation
mode
Question 5 Multiple Choice
W hat is 40th percentile of the following numbers?

39
29.4
17
23
Question 6 Multiple Choice
W hat is the value of the coefficient of skewness for the following population of numbers?

1.04
0.56
0.97
0.28
Question 7 Multiple Choice
Consider the following population of numbers. What is the z score for 6?

0.66
0.95
1.23
+1.23
Question 8 Multiple Choice
Consider the following grouped data. What is the sample variance of these data?

212.69
208.90
14.45
14.58
Question 9 Multiple Choice
W hat is the sample standard deviation of the following numbers?

3.42
2.96
11.67
8.75
Question 10 Multiple Choice
W hat is the mode for the following numbers?

3
4
5
6
Question 11 Multiple Choice
Suppose data are normally distributed with a mean of 120 and a standard deviation of
30. Between what two values will approximately 68% of the data fall?
60 and 180
90 and 150
30 and 210
105 and 135
Question 12 Multiple Choice
The interquartile range is which of the following?

the range of the middle 50% of the data
Q2
the difference between any two quartiles
the square of the standard deviation
Question 13 Multiple Choice
According to Chebyshev's theorem, if a population has a mean of 80 and a standard
deviation of 35, at least what proportion of the values lie between 30 and 130?

.35
.68
.49
.51
Question 14 Multiple Choice
The middle value of an ordered array of numbers is the

mean
median
mode
midpoint
Question 15 Multiple Choice
Consider the following grouped data. What is the mode of these data?

16
35
15
20
Question 16 Multiple Choice
The sum of the deviations about the mean are always:

the range
the standard deviation total
zero
positive
Question 17 Multiple Choice
If a distribution is abnormally tall and peaked, then is can be said that the distribution
is:

mesokurtic
platykurtic
leptokurtic
pyrokurtic
Question 18 Multiple Choice
According to the empirical rule, approximately what percent of the data should lie
within µ± 2σ?

68%
75%
95%
99.7%
Question 19 Multiple Choice
W hat is the first quartile of the following numbers?

55
62.5
65
70
Question 20 Multiple Choice
W hat is the population variance of the following numbers?

3.31
10.98
3.58
12.81
Question 21 Multiple Choice
W hich of the following describe the middle part of a group of numbers?

measures of central tendency
measures of variability
measures of shape
measures of association
Question 22 Multiple Choice
W hat is the coefficient of correlation for the following two variables?
.129
.205
.366
.491
Question 23 Multiple Choice
The mean of a distribution is 23, the median is 24, and the mode is 25.5. It is most
likely that this distribution is:

negatively skewed
positively skewed
symmetrical
asymptotic
Question 24 Multiple Choice
W hat is the mean of the following numbers?

12.5
13
11
10.3
Question 25 Multiple Choice
The mean of a distribution is 14 and the standard deviation is 5. What is the value of
the coefficient of variation?

60.4%
48.3%
35.7%
27.8%