Question 1

A researcher measures eye color for a sample of n = 50 people.Which measure of central tendency would be appropriate to summarize the measurements?

Accepted Answer

A) Mean 
B) Median 
C) Mode 
D) Any of the three measures could be used 
A) Mean 
B) Median 
C) Mode 
D) Any of the three measures could be used

Question 2

A sample of n = 4 scores has a mean of M = 8.If one new score with a value of X = 3 is added to the sample,what will be the value for the new mean?

Accepted Answer

A) M = 7 
B) M = 8 
C) M = 8.75 
D) Cannot be determined with the information provided 
A) M = 7 
B) M = 8 
C) M = 8.75 
D) Cannot be determined with the information provided

Question 3

For the following sample of scores,1,1,2,2,2,2,4,
a.find the mean, median, and mode.
b.if a new individual with a score of X = 2 is added to the sample, what happens to the values for the mean, the median, and the mode?
c.if the score X = 4 in the original distribution is changed to X = 11, what happens to the values for the mean, the median, and the mode?

Accepted Answer

a.The mean,median,and mode are all equal

Question 4

For a positively skewed distribution with a mode of X = 20 and a median of 25,what is the most likely value for the mean?

Accepted Answer

A) Greater than 25 
B) Less than 20 
C) Between 20 and 25 
D) Cannot be determined from the information given 
A) Greater than 25 
B) Less than 20 
C) Between 20 and 25 
D) Cannot be determined from the information given

Question 5

A sample of n = 6 scores has a mean of M = 5.One person with a score of X = 12 is added to the distribution.What is the mean for the new set of scores?

Accepted Answer

A) M = 5 
B) M = 6 
C) M = 7 
D) M = 8 
A) M = 5 
B) M = 6 
C) M = 7 
D) M = 8

Question 6

For a set of scores measured on an ordinal scale,the median is preferred to the mean as a measure of central tendency.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements cannot be true for a distribution of scores?

Accepted Answer

A) 60% of the scores are above the mean. 
B) 60% of the scores are above the median. 
C) 60% of the scores are above the mode. 
D) All of the other options are false statements. 
A) 60% of the scores are above the mean. 
B) 60% of the scores are above the median. 
C) 60% of the scores are above the mode. 
D) All of the other options are false statements.

Question 8

A sample of n = 7 scores has a mean of M = 11.If one score with a value of X = 5 is removed from the sample,what is the mean for the remaining scores?

Accepted Answer

The original sample had n = 7

Question 9

A student takes a 10-point quiz each week in statistics class.If the student's quiz scores for the first three weeks are 2,6,and 10,then the mean score is M = 9.

Accepted Answer

A) True 
 B)False

Question 10

If a sample has an odd number of scores,at least one individual will have a score exactly equal to the median.

Accepted Answer

A) True 
 B)False

Question 11

After 5 points are subtracted from every score,the sample mean is found to be M = 24.What was the mean for the original sample?

Accepted Answer

A) 29 
B) 24 
C) 19 
D) Cannot determine without knowing the number of scores in the sample 
A) 29 
B) 24 
C) 19 
D) Cannot determine without knowing the number of scores in the sample

Question 12

A set of N = 4 scores has a mean of µ = 11.If 8 points are subtracted from one of the scores,what is the new value for the population mean?

Accepted Answer

A) 13 
B) 11 
C) 10 
D) 9 
A) 13 
B) 11 
C) 10 
D) 9

Question 13

It is possible to have a distribution of scores where no individual has a score exactly equal to the mode.

Accepted Answer

A) True 
 B)False

Question 14

A sample of n = 8 scores has a mean of M = 10.After one score is removed from the sample,the mean for the remaining score is found to be M = 11.What was the score that was removed?

Accepted Answer

A) X = 3 
B) X = 7 
C) X = 8 
D) Cannot be determined from the information provided 
A) X = 3 
B) X = 7 
C) X = 8 
D) Cannot be determined from the information provided

Question 15

A sample has a mean of M = 40.If a new score of X = 35 is added to the sample,then the sample mean would increase.

Accepted Answer

A) True 
 B)False

Question 16

One sample with n = 4 scores has a mean of M = 12,and a second sample with n = 6 scores has a mean of M = 8.If the two samples are combined,what is the mean for the combined set of scores?

Accepted Answer

A) 4.8 
B) 9.6 
C) 10.0 
D) 19.2 
A) 4.8 
B) 9.6 
C) 10.0 
D) 19.2

Question 17

A distribution of scores has a mean of 50,a median of 53,and a mode of 56.Based on this information,it appears that the distribution is negatively skewed.

Accepted Answer

A) True 
 B)False

Question 18

What is the mean for the following sample of scores? Scores: 1,4,5,6

Accepted Answer

A) 16 
B) 8 
C) 4.5 
D) 4 
A) 16 
B) 8 
C) 4.5 
D) 4

Question 19

What is the most likely shape for a distribution with a mean of 40 and a mode of 45?

Accepted Answer

A) Symmetrical 
B) Positively skewed 
C) Negatively skewed 
D) Either positively or negatively skewed 
A) Symmetrical 
B) Positively skewed 
C) Negatively skewed 
D) Either positively or negatively skewed

Question 20

A distribution is positively skewed.Which is the most probable order,from smallest to largest,for the three measures of central tendency?

Accepted Answer

A) Mean, median, mode 
B) Mode, median, mean 
C) Mean, mode, median 
D) Median, mean, mode 
A) Mean, median, mode 
B) Mode, median, mean 
C) Mean, mode, median 
D) Median, mean, mode

A researcher measures eye color for a sample of n = 50 people.Which measure of central tendency would be appropriate to summarize the measurements?

A sample of n = 4 scores has a mean of M = 8.If one new score with a value of X = 3 is added to the sample,what will be the value for the new mean?

For a positively skewed distribution with a mode of X = 20 and a median of 25,what is the most likely value for the mean?

A sample of n = 6 scores has a mean of M = 5.One person with a score of X = 12 is added to the distribution.What is the mean for the new set of scores?

For a set of scores measured on an ordinal scale,the median is preferred to the mean as a measure of central tendency.

Which of the following statements cannot be true for a distribution of scores?

A sample of n = 7 scores has a mean of M = 11.If one score with a value of X = 5 is removed from the sample,what is the mean for the remaining scores?

A student takes a 10-point quiz each week in statistics class.If the student's quiz scores for the first three weeks are 2,6,and 10,then the mean score is M = 9.

If a sample has an odd number of scores,at least one individual will have a score exactly equal to the median.

After 5 points are subtracted from every score,the sample mean is found to be M = 24.What was the mean for the original sample?

A set of N = 4 scores has a mean of µ = 11.If 8 points are subtracted from one of the scores,what is the new value for the population mean?

It is possible to have a distribution of scores where no individual has a score exactly equal to the mode.

A sample of n = 8 scores has a mean of M = 10.After one score is removed from the sample,the mean for the remaining score is found to be M = 11.What was the score that was removed?

A sample has a mean of M = 40.If a new score of X = 35 is added to the sample,then the sample mean would increase.

One sample with n = 4 scores has a mean of M = 12,and a second sample with n = 6 scores has a mean of M = 8.If the two samples are combined,what is the mean for the combined set of scores?

A distribution of scores has a mean of 50,a median of 53,and a mode of 56.Based on this information,it appears that the distribution is negatively skewed.

What is the mean for the following sample of scores? Scores: 1,4,5,6

What is the most likely shape for a distribution with a mean of 40 and a mode of 45?

A distribution is positively skewed.Which is the most probable order,from smallest to largest,for the three measures of central tendency?

Introduction to Statistics.

Frequency Distributions.

Variability.

z-Scores: Location of Scores and Standardized Distributions.

Probability.

Probability and Samples: The Distribution of Sample Means.

Introduction to Hypothesis Testing.

Introduction to the t Statistic

The t Test for Two Independent Samples

The t Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Analysis of Variance

Correlation and Regression.

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters

Exam 3: Central Tendency.

A researcher measures eye color for a sample of n = 50 people.Which measure of central tendency would be appropriate to summarize the measurements?

A sample of n = 4 scores has a mean of M = 8.If one new score with a value of X = 3 is added to the sample,what will be the value for the new mean?

For a positively skewed distribution with a mode of X = 20 and a median of 25,what is the most likely value for the mean?

A sample of n = 6 scores has a mean of M = 5.One person with a score of X = 12 is added to the distribution.What is the mean for the new set of scores?

For a set of scores measured on an ordinal scale,the median is preferred to the mean as a measure of central tendency.

Which of the following statements cannot be true for a distribution of scores?

A sample of n = 7 scores has a mean of M = 11.If one score with a value of X = 5 is removed from the sample,what is the mean for the remaining scores?

A student takes a 10-point quiz each week in statistics class.If the student's quiz scores for the first three weeks are 2,6,and 10,then the mean score is M = 9.

If a sample has an odd number of scores,at least one individual will have a score exactly equal to the median.

After 5 points are subtracted from every score,the sample mean is found to be M = 24.What was the mean for the original sample?

A set of N = 4 scores has a mean of µ = 11.If 8 points are subtracted from one of the scores,what is the new value for the population mean?

It is possible to have a distribution of scores where no individual has a score exactly equal to the mode.

A sample of n = 8 scores has a mean of M = 10.After one score is removed from the sample,the mean for the remaining score is found to be M = 11.What was the score that was removed?

A sample has a mean of M = 40.If a new score of X = 35 is added to the sample,then the sample mean would increase.

One sample with n = 4 scores has a mean of M = 12,and a second sample with n = 6 scores has a mean of M = 8.If the two samples are combined,what is the mean for the combined set of scores?

A distribution of scores has a mean of 50,a median of 53,and a mode of 56.Based on this information,it appears that the distribution is negatively skewed.

What is the mean for the following sample of scores? Scores: 1,4,5,6

What is the most likely shape for a distribution with a mean of 40 and a mode of 45?

A distribution is positively skewed.Which is the most probable order,from smallest to largest,for the three measures of central tendency?

Introduction to Statistics.

Frequency Distributions.

Variability.

z-Scores: Location of Scores and Standardized Distributions.

Probability.

Probability and Samples: The Distribution of Sample Means.

Introduction to Hypothesis Testing.

Introduction to the t Statistic

The t Test for Two Independent Samples

The t Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Analysis of Variance

Correlation and Regression.

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters