Question about Statistics Multiple Choice Questions

Question 1 Multiple Choice
Which 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
What is the median for the following numbers?

83
54
48
60

Question 4 Multiple Choice
Which of the following is not a measure of central tendency?

percentile
quartile
standard deviation
mode

Question 5 Multiple Choice
What is 40th percentile of the following numbers?

39
29.4
17
23

Question 6 Multiple Choice
What 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
What is the sample standard deviation of the following numbers?

3.42
2.96
11.67
8.75

Question 10 Multiple Choice
What 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
What is the first quartile of the following numbers?

55
62.5
65
70

Question 20 Multiple Choice
What is the population variance of the following numbers?

3.31
10.98
3.58
12.81

Question 21 Multiple Choice
Which 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
What 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
What 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%

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