Question 1

For the following set of scores, calculate the mean, median and mode: 11, 2, 3, 3, 7, 6.

Accepted Answer

M=5.33, Md

Question 2

The arithmetic average defines the

Accepted Answer

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

Question 3

If a positively skewed and negatively skewed distribution were combined, the resulting distribution would probably be bimodal.

Accepted Answer

A) True 
 B)False

Question 4

Adding just one or two extreme scores to the high end of a distribution, has a great effect on

Accepted Answer

A)  the median, but not the mode 
B)  the mode, but not the mean 
C)  the mean, but not the median 
D)  none of these 
A)  the median, but not the mode 
B)  the mode, but not the mean 
C)  the mean, but not the median 
D)  none of these

Question 5

Thirty-four members of a certain sorority were selected, and asked to indicate how many hours each had spent reading (for pleasure, not school work) during the previous week. The data are as follows: 50, 4, 10, 5, 5, 6, 7, 3, 5, 4, 4, 5, 6, 6, 7, 5, 8, 1, 8, 7, 5, 6, 10, 6, 8, 7, 7, 6, 5, 5, 4, 3, 4, 5.
-If the distribution is skewed, in what direction is the skew?.

Accepted Answer

Skewed to

Question 6

When a graph is constructed using a series of rectangles indicating the frequency of occurrence for each score, it is called a

Accepted Answer

A)  frequency polygon 
B)  frequency rectangle 
C)  scatter plot 
D)  histogram 
A)  frequency polygon 
B)  frequency rectangle 
C)  scatter plot 
D)  histogram

Question 7

The mean, median, and mode are all measures of

Accepted Answer

A)  dispersion 
B)  variability 
C)  central tendency 
D)  all of these 
A)  dispersion 
B)  variability 
C)  central tendency 
D)  all of these

Question 8

When the majority of scores are at the high end of the distribution, but there are a few extremely low scores, the distribution is

Accepted Answer

A)  bimodal 
B)  multimodal 
C)  skewed left 
D)  skewed right 
A)  bimodal 
B)  multimodal 
C)  skewed left 
D)  skewed right

Question 9

Thirty-four members of a certain sorority were selected, and asked to indicate how many hours each had spent reading (for pleasure, not school work) during the previous week. The data are as follows: 50, 4, 10, 5, 5, 6, 7, 3, 5, 4, 4, 5, 6, 6, 7, 5, 8, 1, 8, 7, 5, 6, 10, 6, 8, 7, 7, 6, 5, 5, 4, 3, 4, 5.
-What would the mean and median have been if the highest score had been a 12 instead of a 50?

Accepted Answer

M = 5.85,

Question 10

Perhaps the most serious flaw in graphing data is due to

Accepted Answer

A)  not placing frequencies on the abscissa 
B)  not placing raw scores on the ordinate 
C)  not placing the ordinate on the X axis 
D)  not setting the base of the ordinate at zero 
A)  not placing frequencies on the abscissa 
B)  not placing raw scores on the ordinate 
C)  not placing the ordinate on the X axis 
D)  not setting the base of the ordinate at zero

Question 11

Other things being equal, the mean is the most stable measure when the data form is skewed..

Accepted Answer

A) True 
 B)False

Question 12

One should expect a distribution of personal income measures to be skewed to the right.

Accepted Answer

A) True 
 B)False

Question 13

A bimodal distribution often indicates

Accepted Answer

A)  that there will be two means 
B)  that there will be two medians 
C)  that the mean, median and mode have the same value 
D)  that two separate sub-groups may have probably been measured 
A)  that there will be two means 
B)  that there will be two medians 
C)  that the mean, median and mode have the same value 
D)  that two separate sub-groups may have probably been measured

Question 14

For the following set of scores, calculate the mean, median and mode: 10, 12, 9, 10, 10.

Accepted Answer

M = 10.20,

Question 15

The measurement which occurs most often in a distribution is called the

Accepted Answer

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

Question 16

With a skewed left distribution, the mode is never to the left of the mean.

Accepted Answer

A) True 
 B)False

Question 17

The so-called "wow" graph is always possible whenever

Accepted Answer

A)  scores are presented on the X axis 
B)  the abscissa does not begin with zero 
C)  the base of the ordinate is not set at zero 
D)  two distributions are being presented simultaneously 
A)  scores are presented on the X axis 
B)  the abscissa does not begin with zero 
C)  the base of the ordinate is not set at zero 
D)  two distributions are being presented simultaneously

Question 18

When the median lies to the right of the mean, the distribution is probably

Accepted Answer

A)  bimodal 
B)  multimodal 
C)  skewed left 
D)  skewed right 
A)  bimodal 
B)  multimodal 
C)  skewed left 
D)  skewed right

Question 19

The most appropriate measure of central tendency in a skewed right distribution is the median.

Accepted Answer

A) True 
 B)False

Question 20

Using the mean to indicate centrality on a distribution of income scores usually results in

Accepted Answer

A)  a false image of poverty 
B)  an accurate portrayal of income 
C)  a false image of prosperity 
D)  income scores never lend themselves to centrality 
A)  a false image of poverty 
B)  an accurate portrayal of income 
C)  a false image of prosperity 
D)  income scores never lend themselves to centrality

For the following set of scores, calculate the mean, median and mode: 11, 2, 3, 3, 7, 6.

The arithmetic average defines the

If a positively skewed and negatively skewed distribution were combined, the resulting distribution would probably be bimodal.

Adding just one or two extreme scores to the high end of a distribution, has a great effect on

When a graph is constructed using a series of rectangles indicating the frequency of occurrence for each score, it is called a

The mean, median, and mode are all measures of

When the majority of scores are at the high end of the distribution, but there are a few extremely low scores, the distribution is

Perhaps the most serious flaw in graphing data is due to

Other things being equal, the mean is the most stable measure when the data form is skewed..

One should expect a distribution of personal income measures to be skewed to the right.

A bimodal distribution often indicates

For the following set of scores, calculate the mean, median and mode: 10, 12, 9, 10, 10.

The measurement which occurs most often in a distribution is called the

With a skewed left distribution, the mode is never to the left of the mean.

The so-called "wow" graph is always possible whenever

When the median lies to the right of the mean, the distribution is probably

The most appropriate measure of central tendency in a skewed right distribution is the median.

Using the mean to indicate centrality on a distribution of income scores usually results in

Introduction to Statistics

Measures of Variability

The Normal Curve and Z Score

Z Scores, T Scores and Other Normal Curve Transformations

Probability

Statistics and Parameters

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters

Exam 2: Percentages, Graphs and Measures of Central Tendency

For the following set of scores, calculate the mean, median and mode: 11, 2, 3, 3, 7, 6.

The arithmetic average defines the

If a positively skewed and negatively skewed distribution were combined, the resulting distribution would probably be bimodal.

Adding just one or two extreme scores to the high end of a distribution, has a great effect on

When a graph is constructed using a series of rectangles indicating the frequency of occurrence for each score, it is called a

The mean, median, and mode are all measures of

When the majority of scores are at the high end of the distribution, but there are a few extremely low scores, the distribution is

Perhaps the most serious flaw in graphing data is due to

Other things being equal, the mean is the most stable measure when the data form is skewed..

One should expect a distribution of personal income measures to be skewed to the right.

A bimodal distribution often indicates

For the following set of scores, calculate the mean, median and mode: 10, 12, 9, 10, 10.

The measurement which occurs most often in a distribution is called the

With a skewed left distribution, the mode is never to the left of the mean.

The so-called "wow" graph is always possible whenever

When the median lies to the right of the mean, the distribution is probably

The most appropriate measure of central tendency in a skewed right distribution is the median.

Using the mean to indicate centrality on a distribution of income scores usually results in

Introduction to Statistics

Measures of Variability

The Normal Curve and Z Score

Z Scores, T Scores and Other Normal Curve Transformations

Probability

Statistics and Parameters

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters