# 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%