Question 1

The sum of squares is symbolized as $\ \Sigma $.

Accepted Answer

A) True 
 B)False  False

Question 2

When looking at a distribution of data with a possible outlier, it is important to keep in mind the range of all scores because an extremely high or low outlier may skew the _____of the data set.

Accepted Answer

A)  parameters 
B)  sum of squares 
C)  mean 
D)  mode 
A)  parameters 
B)  sum of squares 
C)  mean 
D)  mode C

Question 3

Mark decides to use the mode as the measure of central tendency for his map study.His data set is 3, 17, 22, 5, 4, 16, 27, 22, 17, 22, 5, 3.What is the mode?

Accepted Answer

A)  5 
B)  17 
C)  22 
D)  27 
A)  5 
B)  17 
C)  22 
D)  27 C

Question 4

The mean is an appropriate measure of center when considering nominal data.

Accepted Answer

A) True 
 B)False

Question 5

The mean is calculated by:

Accepted Answer

A)  determining the midpoint of the scores in the data set, such that half fall above the mean and half fall below. 
B)  summing all of the scores in a data set and then dividing by the total number of scores. 
C)  subtracting the lowest score from the highest score in the data set. 
D)  determining the most common score in a data set. 
A)  determining the midpoint of the scores in the data set, such that half fall above the mean and half fall below. 
B)  summing all of the scores in a data set and then dividing by the total number of scores. 
C)  subtracting the lowest score from the highest score in the data set. 
D)  determining the most common score in a data set.

Question 6

The median is the measure of central tendency that conveys the mathematical center of the data.

Accepted Answer

A) True 
 B)False

Question 7

Six students from a psychology class reported the number of hours of television they watch per week.Here are their data: 18, 12, 15, 14, 13, 16.What is the standard deviation of the number of hours of television watched per week for this sample of six students?

Accepted Answer

A)  1.97 
B)  3.89 
C)  14.67 
D)  23.33 
A)  1.97 
B)  3.89 
C)  14.67 
D)  23.33

Question 8

Here is a set of data: 31, 54, 26, 42, 39, 45, 38, 42.What is the mode?

Accepted Answer

A)  39.63 
B)  40.50 
C)  42.00 
D)  54.00 
A)  39.63 
B)  40.50 
C)  42.00 
D)  54.00

Question 9

The most common score of a distribution is referred to as the:

Accepted Answer

A)  mean. 
B)  median. 
C)  mode. 
D)  range. 
A)  mean. 
B)  median. 
C)  mode. 
D)  range.

Question 10

For a data set that has been skewed due to outliers, what measure of central tendency is most accurate and should be reported?

Accepted Answer

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

Question 11

Professor Kellogg calculates the grades on the first exam for her statistics class.She finds that students did either really well or really poorly.What kind of distribution does Prof.Kellogg have?

Accepted Answer

A)  normal 
B)  unimodal 
C)  bimodal 
D)  negatively skewed 
A)  normal 
B)  unimodal 
C)  bimodal 
D)  negatively skewed

Question 12

Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week.Here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2.What is the range of this distribution?

Accepted Answer

A)  0 to 10 
B)  2 
C)  9 
D)  10 
A)  0 to 10 
B)  2 
C)  9 
D)  10

Question 13

_____ is affected by outliers because it takes the actual value of each data point into consideration.

Accepted Answer

A)  Mode 
B)  Median 
C)  Mean 
D)  Center 
A)  Mode 
B)  Median 
C)  Mean 
D)  Center

Question 14

The most common measure of variability reported in research articles is the standard deviation.

Accepted Answer

A) True 
 B)False

Question 15

When the mean is presented in research articles, it is most often accompanied by the _____ as a measure of variability.

Accepted Answer

A)  range 
B)  variance 
C)  standard deviation 
D)  interquartile range 
A)  range 
B)  variance 
C)  standard deviation 
D)  interquartile range

Question 16

The standard deviation is most commonly used to get a sense of how far the typical score of a distribution differs from the mean.In computing the standard deviation, why is it necessary to square the deviations from the mean for each score?

Accepted Answer

A)  The deviations are too small to have a variance without being squared. 
B)  There is no variability in the deviations of the scores prior to squaring. 
C)  Squaring numbers is a required step in calculating all measures of variability. 
D)  The deviations sum to zero due to negative and positive values. 
A)  The deviations are too small to have a variance without being squared. 
B)  There is no variability in the deviations of the scores prior to squaring. 
C)  Squaring numbers is a required step in calculating all measures of variability. 
D)  The deviations sum to zero due to negative and positive values.

Question 17

In a sample of data that has several extremely low scores, creating negative skew, the mean:

Accepted Answer

A)  will be greater than the mode. 
B)  will be greater than the median. 
C)  and the mode will be equal. 
D)  will be less than the median. 
A)  will be greater than the mode. 
B)  will be greater than the median. 
C)  and the mode will be equal. 
D)  will be less than the median.

Question 18

The range as a measure of variability is problematic because:

Accepted Answer

A)  it does not represent the spread of the distribution. 
B)  calculations of the range are frequently full of errors. 
C)  it is expressed in squared units. 
D)  it relies on the most extreme scores, which could be outliers. 
A)  it does not represent the spread of the distribution. 
B)  calculations of the range are frequently full of errors. 
C)  it is expressed in squared units. 
D)  it relies on the most extreme scores, which could be outliers.

Question 19

Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week.Here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2.What is the variance of the number of alcoholic drinks consumed per week?

Accepted Answer

A)  2.96 
B)  3.26 
C)  8.75 
D)  12.25 
A)  2.96 
B)  3.26 
C)  8.75 
D)  12.25

Question 20

Here is a set of scores: 18, 99, 14, 16, 31, 43, 12, 14, 13, 51, 12.Which score is considered to be an outlier?

Accepted Answer

A)  12 
B)  14 
C)  51 
D)  99 
A)  12 
B)  14 
C)  51 
D)  99

The sum of squares is symbolized as $\\ \Sigma$ .

When looking at a distribution of data with a possible outlier, it is important to keep in mind the range of all scores because an extremely high or low outlier may skew the _____of the data set.

Mark decides to use the mode as the measure of central tendency for his map study.His data set is 3, 17, 22, 5, 4, 16, 27, 22, 17, 22, 5, 3.What is the mode?

The mean is an appropriate measure of center when considering nominal data.

The mean is calculated by:

The median is the measure of central tendency that conveys the mathematical center of the data.

Six students from a psychology class reported the number of hours of television they watch per week.Here are their data: 18, 12, 15, 14, 13, 16.What is the standard deviation of the number of hours of television watched per week for this sample of six students?

Here is a set of data: 31, 54, 26, 42, 39, 45, 38, 42.What is the mode?

The most common score of a distribution is referred to as the:

For a data set that has been skewed due to outliers, what measure of central tendency is most accurate and should be reported?

Professor Kellogg calculates the grades on the first exam for her statistics class.She finds that students did either really well or really poorly.What kind of distribution does Prof.Kellogg have?

Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week.Here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2.What is the range of this distribution?

_____ is affected by outliers because it takes the actual value of each data point into consideration.

The most common measure of variability reported in research articles is the standard deviation.

When the mean is presented in research articles, it is most often accompanied by the _____ as a measure of variability.

The standard deviation is most commonly used to get a sense of how far the typical score of a distribution differs from the mean.In computing the standard deviation, why is it necessary to square the deviations from the mean for each score?

In a sample of data that has several extremely low scores, creating negative skew, the mean:

The range as a measure of variability is problematic because:

Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week.Here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2.What is the variance of the number of alcoholic drinks consumed per week?

Here is a set of scores: 18, 99, 14, 16, 31, 43, 12, 14, 13, 51, 12.Which score is considered to be an outlier?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 4: Central Tendency and Variability

The sum of squares is symbolized as Σ\\ \Sigma Σ .

When looking at a distribution of data with a possible outlier, it is important to keep in mind the range of all scores because an extremely high or low outlier may skew the _____of the data set.

Mark decides to use the mode as the measure of central tendency for his map study.His data set is 3, 17, 22, 5, 4, 16, 27, 22, 17, 22, 5, 3.What is the mode?

The mean is an appropriate measure of center when considering nominal data.

The mean is calculated by:

The median is the measure of central tendency that conveys the mathematical center of the data.

Six students from a psychology class reported the number of hours of television they watch per week.Here are their data: 18, 12, 15, 14, 13, 16.What is the standard deviation of the number of hours of television watched per week for this sample of six students?

Here is a set of data: 31, 54, 26, 42, 39, 45, 38, 42.What is the mode?

The most common score of a distribution is referred to as the:

For a data set that has been skewed due to outliers, what measure of central tendency is most accurate and should be reported?

Professor Kellogg calculates the grades on the first exam for her statistics class.She finds that students did either really well or really poorly.What kind of distribution does Prof.Kellogg have?

Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week.Here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2.What is the range of this distribution?

_____ is affected by outliers because it takes the actual value of each data point into consideration.

The most common measure of variability reported in research articles is the standard deviation.

When the mean is presented in research articles, it is most often accompanied by the _____ as a measure of variability.

The standard deviation is most commonly used to get a sense of how far the typical score of a distribution differs from the mean.In computing the standard deviation, why is it necessary to square the deviations from the mean for each score?

In a sample of data that has several extremely low scores, creating negative skew, the mean:

The range as a measure of variability is problematic because:

Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week.Here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2.What is the variance of the number of alcoholic drinks consumed per week?

Here is a set of scores: 18, 99, 14, 16, 31, 43, 12, 14, 13, 51, 12.Which score is considered to be an outlier?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

The sum of squares is symbolized as $\\ \Sigma$ .