Question 1

In general,a univariate statistic is one in which

Accepted Answer

A) the variable of interest is compared to a single other variable 
B) a single variable is tested for its probability of occurrence 
C) one variable is used to test for a relationship with another 
D) provides information on a single variable 
A) the variable of interest is compared to a single other variable 
B) a single variable is tested for its probability of occurrence 
C) one variable is used to test for a relationship with another 
D) provides information on a single variable D

Question 2

The median is frequently used in sophisticated statistics.

Accepted Answer

A) True 
 B)False  False

Question 3

The presence of extremes can be an argument for using a median with interval level data.

Accepted Answer

A) True 
 B)False  True

Question 4

A mode is most useful when there are extremes in the data.

Accepted Answer

A) True 
 B)False

Question 5

The mode is defined as

Accepted Answer

A) the category with the greatest number of cases 
B) the largest score 
C) the mid-point case of a nominal-level variable 
D) the square root of the nominal centrality divided by the index of dispersion 
A) the category with the greatest number of cases 
B) the largest score 
C) the mid-point case of a nominal-level variable 
D) the square root of the nominal centrality divided by the index of dispersion

Question 6

The example using the U.S.Census Bureau and income in the text of Chapter 4 was an illustration of

Accepted Answer

A) a need to use caution when interpreting the mode 
B) a need to use a mean instead of a median 
C) a need to use a median instead of a mean 
D) there was no example using the Census Bureau and income in Chapter 4 
A) a need to use caution when interpreting the mode 
B) a need to use a mean instead of a median 
C) a need to use a median instead of a mean 
D) there was no example using the Census Bureau and income in Chapter 4

Question 7

Measures of central tendency can only be used with single groups and cannot be used for comparison purposes.

Accepted Answer

A) True 
 B)False

Question 8

If a distribution is bimodal,which of the following would be correct?

Accepted Answer

A) there are only two categories in the variable 
B) two categories of any size are alike 
C) two categories tie for the largest number of cases 
D) there are two high scores in the data 
A) there are only two categories in the variable 
B) two categories of any size are alike 
C) two categories tie for the largest number of cases 
D) there are two high scores in the data

Question 9

The median is:

Accepted Answer

A) the largest score 
B) the middle score in the largest category 
C) the midpoint of an ordered distribution 
D) an arithmetic average 
A) the largest score 
B) the middle score in the largest category 
C) the midpoint of an ordered distribution 
D) an arithmetic average

Question 10

Which of the following can be used with ratio level data?

Accepted Answer

A) median 
B) mean 
C) mode 
D) all of the above 
A) median 
B) mean 
C) mode 
D) all of the above

Question 11

Which of these should be used when extremes occur in interval level data?

Accepted Answer

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

Question 12

Univariate statistics are designed to give us information about relationships.

Accepted Answer

A) True 
 B)False

Question 13

Measures of central tendency focus on the middle of the data.

Accepted Answer

A) True 
 B)False

Question 14

The mean is best defined as

Accepted Answer

A) the arithmetic average of a set of scores 
B) the average centrality of the middle variable in a set of variables 
C) the sum of the number of categories divided by the number of cases 
D) the standardized sum of cases divided by the number of categories 
A) the arithmetic average of a set of scores 
B) the average centrality of the middle variable in a set of variables 
C) the sum of the number of categories divided by the number of cases 
D) the standardized sum of cases divided by the number of categories

Question 15

Which of the following occurs when determining a median with an even number of scores?

Accepted Answer

A) after determining the median,the result must be divided by 2 
B) the result must be divided by the number of cases 
C) you have two cases in the middle 
D) none of the above are correct 
A) after determining the median,the result must be divided by 2 
B) the result must be divided by the number of cases 
C) you have two cases in the middle 
D) none of the above are correct

Question 16

It can sometimes be easier just to look at the data and locate the mean.

Accepted Answer

A) True 
 B)False

Question 17

Measures of central tendency provide a description of a variable by focusing on a point.

Accepted Answer

A) True 
 B)False

Question 18

Measures of central tendency,in general,can be used for

Accepted Answer

A) prediction 
B) splitting up a group for sampling 
C) determining "normal" characteristics of groups 
D) all of the above 
A) prediction 
B) splitting up a group for sampling 
C) determining "normal" characteristics of groups 
D) all of the above

Question 19

Samples with an even number of cases (scores)have an artificial median.

Accepted Answer

A) True 
 B)False

Question 20

Measures of central tendency give us a standard point of reference when looking for differences between groups,

Accepted Answer

A) True 
 B)False

Exam 4: Measures of Central Tendency

In general,a univariate statistic is one in which

The median is frequently used in sophisticated statistics.

The presence of extremes can be an argument for using a median with interval level data.

A mode is most useful when there are extremes in the data.

The mode is defined as

The example using the U.S.Census Bureau and income in the text of Chapter 4 was an illustration of

Measures of central tendency can only be used with single groups and cannot be used for comparison purposes.

If a distribution is bimodal,which of the following would be correct?

The median is:

Which of the following can be used with ratio level data?

Which of these should be used when extremes occur in interval level data?

Univariate statistics are designed to give us information about relationships.

Measures of central tendency focus on the middle of the data.

The mean is best defined as

Which of the following occurs when determining a median with an even number of scores?

It can sometimes be easier just to look at the data and locate the mean.

Measures of central tendency provide a description of a variable by focusing on a point.

Measures of central tendency,in general,can be used for

Samples with an even number of cases (scores)have an artificial median.

Measures of central tendency give us a standard point of reference when looking for differences between groups,

Introduction to Statistics

Levels of Measurement

Graphical Statistics

Measures of Dispersion

Curves and Distributions

Frequency Distributions

Elementary Relationships: Crosstabulation Tables

Hypotheses and Sampling Distributions

Statistical Significance

Testing for Significance: the Chi-Square Test

Testing for Significance in Two Groups: the T-Test

Testing for Significance in Multiple Groups: the Analysis of Variance Statistic

The Concept of Association

Testing for Association: Phi

Testing for Association: Pearsons R and Regression

Doing Real Research: Elementary Multivariate Relationships

Box Plots

Skewness and Kurtosis

Ordinal-Level Tests of Significance

Multiple Comparison Tests

Nominal Level Tests of Association

Ordinal Level Tests of Association

Addendum Probability

Filters