Question 1

It is possible for a distribution to have more than one mode.

Accepted Answer

A) True 
 B)False

Question 2

What is the value of the median for the following set of scores?

Accepted Answer

A) 6 
B) 6.5 Scores: 1, 3, 4, 6, 7, 8, 12, 23 
C) 7 
D) 64/8 = 8 
A) 6 
B) 6.5 Scores: 1, 3, 4, 6, 7, 8, 12, 23 
C) 7 
D) 64/8 = 8

Question 3

A population with a mean of μ = 6 has ΣX = 42.How many scores are in the population?

Accepted Answer

A) N = 7 
B) N = 252 
C) N = 6/42 = 1/7 
D) cannot be determined from the information given 
A) N = 7 
B) N = 252 
C) N = 6/42 = 1/7 
D) cannot be determined from the information given

Question 4

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 5

If a negatively skewed distribution has a mean of 50, then the median and the mode are both probably greater than 50.

Accepted Answer

A) True 
 B)False

Question 6

For any distribution of scores at least one individual will have a score exactly equal to the mean.

Accepted Answer

A) True 
 B)False

Question 7

What is the mean for the population of scores shown in the frequency distribution table? $\begin{array}{cc}
X & f \
\hline 5 & 1 \
4 & 2 \
3 & 3 \
2 & 4 \
1 & 2
\end{array}$

Accepted Answer

A)  $ 15 / 5=3 $ 
B)  $ 15 / 12=1.25 $ 
C)  $ 32 / 5=6.60 $ 
D)  $ 32 / 12=2.67 $ 
A)  $ 15 / 5=3 $ 
B)  $ 15 / 12=1.25 $ 
C)  $ 32 / 5=6.60 $ 
D)  $ 32 / 12=2.67 $

Question 8

Changing the value of a score in a distribution will always change the value of the mean.

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) No one has a score exactly equal to the mean. 
B) No one has a score exactly equal to the median. 
C) No one has a score exactly equal to the mode. 
D) All of the other options are false statements. 
A) No one has a score exactly equal to the mean. 
B) No one has a score exactly equal to the median. 
C) No one has a score exactly equal to the mode. 
D) All of the other options are false statements.

Question 10

Which of the following actions will always change the value of the mean?

Accepted Answer

A) changing the value of one score 
B) adding a new score to the distribution 
C) removing a score from the distribution 
D) All 3 of the other choices are correct. 
A) changing the value of one score 
B) adding a new score to the distribution 
C) removing a score from the distribution 
D) All 3 of the other choices are correct.

Question 11

After adding 6 points to every score in a sample, the new mean is found to be M = 18.The mean for the original sample was M = 24.

Accepted Answer

A) True 
 B)False

Question 12

What is the mode for the following sample of n = 8 scores? Scores: 0, 1, 1, 1, 2, 2, 3, 3

Accepted Answer

A) 1 
B) 1.5 
C) 13/8 = 1.625 
D) 3 
A) 1 
B) 1.5 
C) 13/8 = 1.625 
D) 3

Question 13

A sample of n = 7 scores has a mean of M = 5.After one new score is added to the sample the new mean is calculated to be M = 6.The new score was X = 13.

Accepted Answer

A) True 
 B)False

Question 14

A sample of n = 5 scores has a mean of M = 12.What is ΣX for this sample?

Accepted Answer

A) 12/5 = 2.40 
B) 5/12 = 0.417 
C) 5(12) = 60 
D) cannot be determined from the information given 
A) 12/5 = 2.40 
B) 5/12 = 0.417 
C) 5(12) = 60 
D) cannot be determined from the information given

Question 15

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) impossible to determine from the information provided 
A) X = 3 
B) X = 7 
C) X = 8 
D) impossible to determine from the information provided

Question 16

For a negatively skewed distribution with a mode of X = 25 and a median of 20, 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 17

For the scores in the following frequency distribution table, the mean is M = 3. $\begin{array}{ll}
X & f \
\hline 4 & 1 \
3 & 4 \
2 & 2
\end{array}$

Accepted Answer

A) True 
 B)False

Question 18

A population of N = 7 scores has a mean of $\mu$ = 10.If one score with a value of X = 4 is removed from the population, what is the value for the new mean?

Accepted Answer

A) 70/6 
B) 66/7 
C) 66/6 = 11 
D) cannot be determined from the information given 
A) 70/6 
B) 66/7 
C) 66/6 = 11 
D) cannot be determined from the information given

Question 19

In a population of N = 6, five of the individuals all have scores that are exactly 1 point above the mean.From this information, what can you determine about the score for the sixth individual?

Accepted Answer

A) It is also above the mean by 1 point. 
B) It is below the mean by 1 point. 
C) It is below the mean by 5 points. 
D) There is not enough information to describe the 6th score. 
A) It is also above the mean by 1 point. 
B) It is below the mean by 1 point. 
C) It is below the mean by 5 points. 
D) There is not enough information to describe the 6th score.

Question 20

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

It is possible for a distribution to have more than one mode.

What is the value of the median for the following set of scores?

A population with a mean of μ = 6 has ΣX = 42.How many scores are in the population?

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?

If a negatively skewed distribution has a mean of 50, then the median and the mode are both probably greater than 50.

For any distribution of scores at least one individual will have a score exactly equal to the mean.

What is the mean for the population of scores shown in the frequency distribution table? X f 5 1 4 2 3 3 2 4 1 2

Changing the value of a score in a distribution will always change the value of the mean.

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

Which of the following actions will always change the value of the mean?

After adding 6 points to every score in a sample, the new mean is found to be M = 18.The mean for the original sample was M = 24.

What is the mode for the following sample of n = 8 scores? Scores: 0, 1, 1, 1, 2, 2, 3, 3

A sample of n = 7 scores has a mean of M = 5.After one new score is added to the sample the new mean is calculated to be M = 6.The new score was X = 13.

A sample of n = 5 scores has a mean of M = 12.What is ΣX for this sample?

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?

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

For the scores in the following frequency distribution table, the mean is M = 3. X f 4 1 3 4 2 2

A population of N = 7 scores has a mean of $\mu$ = 10.If one score with a value of X = 4 is removed from the population, what is the value for the new mean?

In a population of N = 6, five of the individuals all have scores that are exactly 1 point above the mean.From this information, what can you determine about the score for the sixth individual?

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

Introduction to Statistics

Frequency Distributions

Variability

Z-Scores

Probability

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 Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

Exam 3: Central Tendency

It is possible for a distribution to have more than one mode.

What is the value of the median for the following set of scores?

A population with a mean of μ = 6 has ΣX = 42.How many scores are in the population?

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?

If a negatively skewed distribution has a mean of 50, then the median and the mode are both probably greater than 50.

For any distribution of scores at least one individual will have a score exactly equal to the mean.

What is the mean for the population of scores shown in the frequency distribution table? X f 5 1 4 2 3 3 2 4 1 2

Changing the value of a score in a distribution will always change the value of the mean.

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

Which of the following actions will always change the value of the mean?

After adding 6 points to every score in a sample, the new mean is found to be M = 18.The mean for the original sample was M = 24.

What is the mode for the following sample of n = 8 scores? Scores: 0, 1, 1, 1, 2, 2, 3, 3

A sample of n = 7 scores has a mean of M = 5.After one new score is added to the sample the new mean is calculated to be M = 6.The new score was X = 13.

A sample of n = 5 scores has a mean of M = 12.What is ΣX for this sample?

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?

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

For the scores in the following frequency distribution table, the mean is M = 3. X f 4 1 3 4 2 2

A population of N = 7 scores has a mean of μ\muμ = 10.If one score with a value of X = 4 is removed from the population, what is the value for the new mean?

In a population of N = 6, five of the individuals all have scores that are exactly 1 point above the mean.From this information, what can you determine about the score for the sixth individual?

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

Introduction to Statistics

Frequency Distributions

Variability

Z-Scores

Probability

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 Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

A population of N = 7 scores has a mean of $\mu$ = 10.If one score with a value of X = 4 is removed from the population, what is the value for the new mean?