Question 1

Numbers that describe samples are called:

Accepted Answer

A)  statistics. 
B)  parameters. 
C)  averages. 
D)  variables. 
A)  statistics. 
B)  parameters. 
C)  averages. 
D)  variables.

Question 2

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

Accepted Answer

A)  28.0 
B)  40.5 
C)  42.0 
D)  54.0 
A)  28.0 
B)  40.5 
C)  42.0 
D)  54.0

Question 3

The last value in a five-number summary is the:

Accepted Answer

A)  75th percentile. 
B)  minimum value. 
C)  median. 
D)  maximum value. 
A)  75th percentile. 
B)  minimum value. 
C)  median. 
D)  maximum value.

Question 4

Numbers that describe populations are called:

Accepted Answer

A)  statistics. 
B)  parameters. 
C)  averages. 
D)  variables. 
A)  statistics. 
B)  parameters. 
C)  averages. 
D)  variables.

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

If the standard deviation of some data is 4.19, what is the range?

Accepted Answer

A)  0.93 
B)  0.89 
C)  0.74 
D)  It is impossible to determine the range based on the information provided. 
A)  0.93 
B)  0.89 
C)  0.74 
D)  It is impossible to determine the range based on the information provided.

Question 7

Which set of scores has the least amount of variability?

Accepted Answer

A)  22, 26, 21, 23 
B)  32, 72, 86, 100 
C)  5, 18, 62, 78 
D)  101, 110, 56, 13 
A)  22, 26, 21, 23 
B)  32, 72, 86, 100 
C)  5, 18, 62, 78 
D)  101, 110, 56, 13

Question 8

Compared to the interquartile range, the range is less susceptible to the influence of outliers.

Accepted Answer

A) True 
 B)False

Question 9

A unimodal distribution has _____ mode(s).

Accepted Answer

A)  one 
B)  two 
C)  two or more 
D)  more than two 
A)  one 
B)  two 
C)  two or more 
D)  more than two

Question 10

The standard deviation is expressed in squared units.

Accepted Answer

A) True 
 B)False

Question 11

The _____ is equal to the square root of the _____.

Accepted Answer

A)  variance; standard deviation 
B)  standard deviation; variance 
C)  central tendency; mean 
D)  mean; central tendency 
A)  variance; standard deviation 
B)  standard deviation; variance 
C)  central tendency; mean 
D)  mean; central tendency

Question 12

A graduate business class receives these grades on the final exam: 96, 76, 81, 87, 90, 74, 88, 95, 80, 93.What is the median test score?

Accepted Answer

A)  84.5 
B)  87.0 
C)  87.5 
D)  88.0 
A)  84.5 
B)  87.0 
C)  87.5 
D)  88.0

Question 13

In a sample of data that has several extremely low scores, creating negative skew, the mean will be _____ the median.

Accepted Answer

A)  less than 
B)  greater than 
C)  equal to 
D)  double 
A)  less than 
B)  greater than 
C)  equal to 
D)  double

Question 14

The median household income in Albemarle County, Virginia, for the year 2005 was $61,660.If the mean and mode are also computed, which statement could NOT be true?

Accepted Answer

A)  Half of the households had incomes below the median. 
B)  The majority of households had incomes above the mean. 
C)  The majority of households had incomes above the median. 
D)  The majority of households had incomes above the mode. 
A)  Half of the households had incomes below the median. 
B)  The majority of households had incomes above the mean. 
C)  The majority of households had incomes above the median. 
D)  The majority of households had incomes above the mode.

Question 15

Sixteen college freshmen were asked to record the number of alcoholic drinks that 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 median number of alcoholic drinks consumed per week?

Accepted Answer

A)  4.0 
B)  4.5 
C)  5.0 
D)  5.5 
A)  4.0 
B)  4.5 
C)  5.0 
D)  5.5

Question 16

It is easier to distort and lie with the median than with the mean.

Accepted Answer

A) True 
 B)False

Question 17

At 24 years of age, Megan is 5 feet, 6 inches tall.The national average for height is 5 feet, 4 inches, so Megan is taller than average.The national average is a:

Accepted Answer

A)  population parameter. 
B)  standardized measure. 
C)  sum of squares. 
D)  sample statistic. 
A)  population parameter. 
B)  standardized measure. 
C)  sum of squares. 
D)  sample statistic.

Question 18

Mark is looking at distance estimates of where participants think cities are located on a map.Since the estimates are given by x, y coordinates, Mark thinks he should use the mode as a measure of central tendency.What other measures of central tendency are also available?

Accepted Answer

A)  median and mean 
B)  median and outliers 
C)  range and sum of squares 
D)  outliers and mean 
A)  median and mean 
B)  median and outliers 
C)  range and sum of squares 
D)  outliers and mean

Question 19

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

Accepted Answer

A)  26.00 
B)  28.00 
C)  39.63 
D)  52.84 
A)  26.00 
B)  28.00 
C)  39.63 
D)  52.84

Question 20

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

Accepted Answer

A)  26 
B)  28 
C)  42 
D)  54 
A)  26 
B)  28 
C)  42 
D)  54

Numbers that describe samples are called:

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

The last value in a five-number summary is the:

Numbers that describe populations are called:

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

If the standard deviation of some data is 4.19, what is the range?

Which set of scores has the least amount of variability?

Compared to the interquartile range, the range is less susceptible to the influence of outliers.

A unimodal distribution has _____ mode(s).

The standard deviation is expressed in squared units.

The _ is equal to the square root of the _.

A graduate business class receives these grades on the final exam: 96, 76, 81, 87, 90, 74, 88, 95, 80, 93.What is the median test score?

In a sample of data that has several extremely low scores, creating negative skew, the mean will be _____ the median.

The median household income in Albemarle County, Virginia, for the year 2005 was $61,660.If the mean and mode are also computed, which statement could NOT be true?

Sixteen college freshmen were asked to record the number of alcoholic drinks that 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 median number of alcoholic drinks consumed per week?

It is easier to distort and lie with the median than with the mean.

At 24 years of age, Megan is 5 feet, 6 inches tall.The national average for height is 5 feet, 4 inches, so Megan is taller than average.The national average is a:

Mark is looking at distance estimates of where participants think cities are located on a map.Since the estimates are given by x, y coordinates, Mark thinks he should use the mode as a measure of central tendency.What other measures of central tendency are also available?

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

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

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

Numbers that describe samples are called:

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

The last value in a five-number summary is the:

Numbers that describe populations are called:

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

If the standard deviation of some data is 4.19, what is the range?

Which set of scores has the least amount of variability?

Compared to the interquartile range, the range is less susceptible to the influence of outliers.

A unimodal distribution has _____ mode(s).

The standard deviation is expressed in squared units.

The _____ is equal to the square root of the _____.

A graduate business class receives these grades on the final exam: 96, 76, 81, 87, 90, 74, 88, 95, 80, 93.What is the median test score?

In a sample of data that has several extremely low scores, creating negative skew, the mean will be _____ the median.

The median household income in Albemarle County, Virginia, for the year 2005 was $61,660.If the mean and mode are also computed, which statement could NOT be true?

Sixteen college freshmen were asked to record the number of alcoholic drinks that 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 median number of alcoholic drinks consumed per week?

It is easier to distort and lie with the median than with the mean.

At 24 years of age, Megan is 5 feet, 6 inches tall.The national average for height is 5 feet, 4 inches, so Megan is taller than average.The national average is a:

Mark is looking at distance estimates of where participants think cities are located on a map.Since the estimates are given by x, y coordinates, Mark thinks he should use the mode as a measure of central tendency.What other measures of central tendency are also available?

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

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

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 _ is equal to the square root of the _.