Question 1

For a bell-shaped distribution with µ = 30,what is the most probable value for the mode?​

Accepted Answer

A) ​30 
B) ​greater than 30 
C) ​less than 30 
D) ​0 
A) ​30 
B) ​greater than 30 
C) ​less than 30 
D) ​0

Question 2

Which of the following statements is true for a distribution of data points?​

Accepted Answer

A) ​75% of the data points are above the median. 
B) ​50% of the scores are above the median. 
C) ​60% of the scores are below the median. 
D) ​95% of the data points are above the median. 
A) ​75% of the data points are above the median. 
B) ​50% of the scores are above the median. 
C) ​60% of the scores are below the median. 
D) ​95% of the data points are above the median.

Question 3

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) ​weighted mean 
A) ​mean 
B) ​median 
C) ​mode 
D) ​weighted mean

Question 4

A sample has a mean of M = 40.If a new score of X = 55 is added to the sample,then the sample mean would increase.​

Accepted Answer

A) True 
 B)False

Question 5

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 6

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 = 7.0 
B) ​M = 8.0 
C) ​M = 8.8 
D) ​M=11.0 
A) ​M = 7.0 
B) ​M = 8.0 
C) ​M = 8.8 
D) ​M=11.0

Question 7

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

Accepted Answer

A) True 
 B)False

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

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 10

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 11

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 weighted 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 12

A population of N = 10 scores has a mean of µ = 6.After one score is removed,the mean is found to be M = 5.What is the value of the score that was removed?​

Accepted Answer

A) ​X = 3 
B) ​X = 5 
C) ​X = 10 
D) ​X = 15 
A) ​X = 3 
B) ​X = 5 
C) ​X = 10 
D) ​X = 15

Question 13

Compute the mean,median,and mode for the set of scores shown in the following frequency distribution table.​ $$\begin{array} { c c } 
\mathrm { X } & \mathrm { f } \
\hline 7 & 1 \
6 & 2 \
5 & 3 \
4 & 4 \
3 & 1 \
2 & 0 \
1 & 1
\end{array}$$

Accepted Answer

The mean is 54/12 =

Question 14

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

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 15

A sample has n = 5 scores: 2,4,5,8,and 11.The median for the sample is 6.5.​

Accepted Answer

A) True 
 B)False

Question 16

What is the mean for the following sample of scores?​ Scores: 1,4,5,10

Accepted Answer

A) ​20 
B) ​10 
C) ​5 
D) ​4 
A) ​20 
B) ​10 
C) ​5 
D) ​4

Question 17

A distribution with two modes is said to be:​

Accepted Answer

A) ​two modal 
B) ​minor modal 
C) ​bimodal 
D) ​main modal 
A) ​two modal 
B) ​minor modal 
C) ​bimodal 
D) ​main modal

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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) ​Adding a score equal to the mean. 
A) ​Changing the value of one score 
B) ​Adding a new score to the distribution 
C) ​Removing a score from the distribution 
D) ​Adding a score equal to the mean.

Question 20

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

For a bell-shaped distribution with µ = 30,what is the most probable value for the mode?

Which of the following statements is true for a distribution of data points?

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 has a mean of M = 40.If a new score of X = 55 is added to the sample,then the sample mean would increase.

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

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?

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

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

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

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 weighted mean for the combined set of scores?

A population of N = 10 scores has a mean of µ = 6.After one score is removed,the mean is found to be M = 5.What is the value of the score that was removed?

Compute the mean,median,and mode for the set of scores shown in the following frequency distribution table. 7 1 6 2 5 3 4 4 3 1 2 0 1 1

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

A sample has n = 5 scores: 2,4,5,8,and 11.The median for the sample is 6.5.

What is the mean for the following sample of scores? Scores: 1,4,5,10

A distribution with two modes is said to be:

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

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

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 Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

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

The Binomial Test

Filters

Exam 3: Central Tendency

For a bell-shaped distribution with µ = 30,what is the most probable value for the mode?​

Which of the following statements is true for a distribution of data points?​

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 has a mean of M = 40.If a new score of X = 55 is added to the sample,then the sample mean would increase.​

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

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?​

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

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

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

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 weighted mean for the combined set of scores?​

A population of N = 10 scores has a mean of µ = 6.After one score is removed,the mean is found to be M = 5.What is the value of the score that was removed?​

Compute the mean,median,and mode for the set of scores shown in the following frequency distribution table.​ 7 1 6 2 5 3 4 4 3 1 2 0 1 1

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

A sample has n = 5 scores: 2,4,5,8,and 11.The median for the sample is 6.5.​

What is the mean for the following sample of scores?​ Scores: 1,4,5,10

A distribution with two modes is said to be:​

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

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

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 Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

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

The Binomial Test

Filters

For a bell-shaped distribution with µ = 30,what is the most probable value for the mode?

Which of the following statements is true for a distribution of data points?

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 has a mean of M = 40.If a new score of X = 55 is added to the sample,then the sample mean would increase.

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

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?

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

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

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

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 weighted mean for the combined set of scores?

A population of N = 10 scores has a mean of µ = 6.After one score is removed,the mean is found to be M = 5.What is the value of the score that was removed?

Compute the mean,median,and mode for the set of scores shown in the following frequency distribution table. 7 1 6 2 5 3 4 4 3 1 2 0 1 1

A sample has n = 5 scores: 2,4,5,8,and 11.The median for the sample is 6.5.

What is the mean for the following sample of scores? Scores: 1,4,5,10

A distribution with two modes is said to be:

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

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