Deck 2: Means to an End: Computing and Understanding Averages

Question 1

If a distribution is "significantly distorted," what is this called?

A)variability
B)outliers
C)skew
D)percentile

Answer 1

C

Question 2

This measure of central tendency can be considered the least precise.

A)median
B)mode
C)mean
D)other

Answer 2

B

Question 3

What should be used to determine central tendency?

A)a correlation
B)a graph
C)the standard deviation
D)the average

Answer 3

D

Question 4

Which of the following is NOT a measure of central tendency?

A)median
B)mode
C)standard deviation
D)mean

Question 5

What is the name of the letter Σ

A)phi
B)rho
C)sigma
D)alpha

Question 6

What is the formula for computing the mean?

A)ΣX + n
B)ΣY / X
C)ΣX / n
D)ΣN + y

Question 7

What is another term for the mean?

A)midpoint
B)frequency
C)arithmetic average
D)distribution

Question 8

What is the symbol used to represent the mean?

A)N
B)n
C) $$\bar { x }$$
D)X

Question 9

Which of the following symbols represents sample size?

A)X
B)y
C)n
D)M

Question 10

This measure of central tendency can be considered the most precise.

A)mode
B)median
C)mean
D)average

Question 11

What is the most common average computed?

A)mode
B)mean
C)variance
D)median

Question 12

This consists of the middle point of a set of values:

A)mean
B)median
C)mode
D)other

Question 13

This is calculated by multiplying values by the frequency of their occurrence, adding the total of all the products, and then dividing by the total number of occurrences.

A)mean
B)arithmetic mean
C)mode
D)weighted mean

Question 14

What does the symbol M represent?

A)population size
B)sample size
C)mean
D)individual score

Question 15

What does the Σsymbol represent?

A)the mean
B)the sum of values
C)the sample size
D)an individual score

Question 16

The ______ value that best represents an entire group of scores.

A)mean
B)median
C)mode
D)average

Question 17

What value is most often used to represent an entire group of scores?

A)mode
B)N
C)median
D)mean

Question 18

What is another way of describing "measures of central tendency"?

A)statistical measures
B)measures of variability
C)averages
D)deviation scores

Question 19

Which of the following symbols represents the individual score?

A)X
B)n
C)N
D)Σ

Question 20

If you know M = 5, and the sum of scores is 20, what is n?

A)4
B).25
C)100
D)need more information

Question 21

What is the median for the following amounts: $11.75, $12.75, $13.00, $10.75, $11.50, $10.50, $10.75?

A)$11.50
B)$11.75
C)$11.57
D)$11.00

Question 22

The mode will always consist of the ______.

A)the number of cases in the category
B)the name of the category
C)the format of the category
D)the size of the category

Question 23

What is the mode of the following data: 52 bowls of spaghetti, 37 bowls of cereal, 14 sandwiches, and 17 personal pizzas?

A)bowls of cereal
B)sandwiches
C)52
D)bowls of spaghetti

Question 24

What is the mean value of the following scores: 117, 132, 147, 156, 196?

A)151.2
B)149.6
C)147.0
D)148.7

Question 25

Which of the following best describes the mode?

A)sum of all values in a group
B)midpoint in a set of scores
C)number of subject collected
D)most frequently occurring value(s)

Question 26

Which measure of central tendency is most influenced by outliers?

A)median
B)mode
C)mean
D)variance

Question 27

What is the mean value of the following scores: 12, 25, 15, 27, 32, 8?

A)19.83
B)21.24
C)20.00
D)19.98

Question 28

Your current exam mean is 95.If you receive a 95 on the next exam, this will have the effect of ______.

A)increasing your mean
B)decreasing your mean
C)having no effect on your mean
D)cannot be determined

Question 29

What is the mode of the following data: 47 Republicans, 49 Democrats, and 52 independents?

A)52
B)Republicans
C)Democrats
D)Independents

Question 30

Which of the following defines the median?

A)sum of all values in a group
B)most frequently occurring value
C)average variability in a set of scores
D)midpoint in a set of scores

Question 31

What is the mode of the following data: 57 males and 43 females?

A)57
B)males
C)females
D)cannot be determined

Question 32

Your current exam mean is 97.2.If you receive a 99 on the next exam, this will have the effect of ______.

A)increasing your mean
B)decreasing your mean
C)having no effect on your mean
D)cannot be determined

Question 33

Which measure of central tendency is also known as the midpoint for a set of scores?

A)mode
B)mean
C)median
D)sum

Question 34

What is the mean value of the following scores: 1.11, 1.17, 1.15, 2.02, 2.07, 3.11, 2.14?

A)2.14
B)2.07
C)1.74
D)1.82

Question 35

Your current exam mean is 93.2.If you receive an 87 on the next exam, this will have the effect of ______.

A)increasing your mean
B)decreasing your mean
C)having no effect on your mean
D)cannot determine

Question 36

What does the large N represent?

A)sample size
B)population size
C)sum of scores
D)mean score

Question 37

What does the small n represent?

A)sample size
B)population size
C)sum of scores
D)mean score

Question 38

What is the mean value for the following scores: 10, 35, 40, 60, 55, 25, 50?

A)45
B)44.17
C)40
D)39.29

Question 39

What is the median for the following amounts: $13,400; $17,560; $45,440; $68,550; $96,400?

A)$13,400
B)$48,240
C)$45,440
D)$96,400

Question 40

If ΣX= 4,390 and n = 4, what is M?

A)17,560
B).0100
C)1097.5
D)Need more information

Question 41

When there is an even number of scores, how is the median calculated?

A)average the two middle scores.
B)use the smaller of the two middle scores.
C)use the larger of the two middle scores.
D)the median cannot be calculated.

Question 42

What is the 75th percentile also known as?

A)Q1
B)Q2
C)Q3
D)Q4

Question 43

Which of the following sets of data illustrates skew?

A)2, 3, 5, 7, 9
B)450, 472, 523, 547, 601
C)23, 37, 42, 51, 147
D)12, 14, 15, 17, 19

Question 44

What impact do extreme scores have on the median?

A)positive skew
B)negative skew
C)minimal impact
D)nullify the value

Question 45

What would be your preferred measure of central tendency if you had the following data: $32,400; $42,500; $47,250; $49,570; $145,850?

A)mean
B)median
C)mode
D)weighted mean

Question 46

What would be your preferred measure of central tendency if you had the following data: $31,550; $33,750; $34,700; $37,550; $39,275?

A)mean
B)mode
C)median
D)average

Question 47

Market researchers sent out a survey to college students in Ohio to assess their preferences in regard to three different brands of honey.When examining the average preference of the respondents, which measure of central tendency is most likely to be used to describe them?

A)median
B)mean
C)mode
D)cannot be determined

Question 48

What would be your preferred measure of central tendency if you had the following data: 23 Americans, 57 Mexicans, and 14 Canadians?

A)mean
B)weighted mean
C)median
D)mode

Question 49

A test score in the 3rd percentile would be considered _______.

A)very high
B)very low
C)about average
D)cannot be determined

Question 50

What is the median of the following set of scores: 1.3, 4.7, 2.3, 3.3, 3.0, 2.9?

A)2.95
B)3.05
C)2.90
D)3.00

Question 51

What does the term skew mean?

A)significantly distort
B)divide
C)add
D)equalize

Question 52

What is the 25th percentile also known as?

A)Q1
B)Q2
C)Q3
D)Q4

Question 53

A test score in the 97th percentile would be considered _______.

A)very high
B)very low
C)about average
D)cannot be determined

Question 54

If you were to calculate the average of individual income, and you found no outliers, which measure of central tendency should you use?

A)mode
B)median
C)mean
D)other

Question 55

A test score in the 47th percentile would be considered _______.

A)very high
B)very low
C)about average
D)cannot be determined

Question 56

If you were to calculate the average of individual income, and you found many extreme scores, which measure of central tendency should be used?

A)mean
B)median
C)mode
D)standard error

Question 57

What is the median of the following set of scores: 23, 17, 15, 32, 38, 47?

A)23
B)32
C)17.4
D)27.5

Question 58

Which of the following are used to define the percentage of cases equal to and below a certain point in a distribution of scores?

A)T scores
B)Q points
C)standard scores
D)percentile points

Question 59

With regard to percentile points, what is the median also known as?

A)Q1
B)Q2
C)Q3
D)Q4

Question 60

What would be your preferred measure of central tendency if you had the following data: 57 males and 23 females?

A)median
B)weighted mean
C)mean
D)mode

Question 61

The nominal level can be the least precise level of measurement.

Question 62

While there are three measures of central tendency, the mean, median, and mode are all interchangeable anyway.

Question 63

How would you calculate a weighted mean?

Question 64

When is the mode the best measure of central tendency to use?

Question 65

When is the ordinal level of measurement the correct level of measurement to use?

Question 66

A researcher should use the mode as a measure of central tendency when the data are qualitative in nature.

Question 67

The ratio level is the most precise level of measurement.

Question 68

Nominal levels of measurements have categories that are not mutually exclusive.

Question 69

What is meant by the term outlier?

Question 70

Why is the mean the most frequently used measure of central tendency?

Question 71

When is the nominal level of measurement the correct level of measurement to use?

Question 72

When is the ratio level of measurement the correct level of measurement to use?

Question 73

The interval level of measurement is based on some underlying continuum.

Question 74

The ratio level of measure does have a zero on the scale.

Question 75

What does the term bimodal mean?

Question 76

What is the formula for calculating the mean? What does each of the symbols represent?

Question 77

The ordinal level of measurement stands for order.

Question 78

When might the median be the more appropriate measure of central tendency over the mean?

Question 79

The more precise scales contain all the qualities of the scales below them.