Question 1

A sample has a mean of M = 40.If 10 points are added to one of the scores,what happens to the sample mean?​

Accepted Answer

A) ​it is unchanged 
B) ​it increases 
C) ​it decreases a little 
D) ​it decreases substantially 
A) ​it is unchanged 
B) ​it increases 
C) ​it decreases a little 
D) ​it decreases substantially

Question 2

For a 100-point exam,a score of X = 65 is definitely above the median.​

Accepted Answer

A) True 
 B)False

Question 3

A researcher is measuring the amount of time needed to solve a set of anagrams for a sample of n = 15 students.However,one of the participants fails to solve the problems so the researcher has an undetermined score.What is the best measure of central tendency for these data?​

Accepted Answer

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

Question 4

One sample has n = 4 scores and M = 10.A second sample has n = 6 scores and M = 5.If the two samples are combined,then what is the weighted mean for the combined sample?​

Accepted Answer

A) ​70/4 = 17.5 
B) ​70/6 = 11.7 
C) ​70/10 = 7.0 
D) ​10/5=2.0 
A) ​70/4 = 17.5 
B) ​70/6 = 11.7 
C) ​70/10 = 7.0 
D) ​10/5=2.0

Question 5

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) ​It is equal to the mean. 
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) ​It is equal to the mean.

Question 6

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 7

For a negatively skewed distribution,the mean usually has a larger value than either the median or the mode.​

Accepted Answer

A) True 
 B)False

Question 8

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 9

There are situations for which it is either impossible to compute a mean or the mean does not provide a central,representative value.​

Accepted Answer

A) True 
 B)False

Question 10

What is the median for the following set of scores? Scores: 1,2,6,11,17​

Accepted Answer

A) ​4 
B) ​6 
C) ​8.5 
D) ​8 
A) ​4 
B) ​6 
C) ​8.5 
D) ​8

Question 11

For a negatively skewed distribution with a mean of M = 20,what is the most probable value for the median?​

Accepted Answer

A) ​greater than 20 
B) ​20 
C) ​less than 20 
D) ​0 
A) ​greater than 20 
B) ​20 
C) ​less than 20 
D) ​0

Question 12

A population of N = 6 scores has ΣX = 30.What is the population mean?​

Accepted Answer

A) 180​ 
B) ​30 
C) ​15 
D) ​5 
A) 180​ 
B) ​30 
C) ​15 
D) ​5

Question 13

What is the mode 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) 2? 
B) ?3 
C) ?3.5 
D) ?4 
A) 2? 
B) ?3 
C) ?3.5 
D) ?4

Question 14

What is the mean for the following scores? Scores: 1,6,14​

Accepted Answer

A) ​3 
B) ​6 
C) ​7 
D) ​10.5 
A) ​3 
B) ​6 
C) ​7 
D) ​10.5

Question 15

In a sample of n = 6 scores,the smallest score is X = 3,the largest score is X = 10,and the mean is M = 6.If the largest score is changed from X = 10 to X = 22,then what is the value of the new mean?​

Accepted Answer

A) ​The mean is still M = 6. 
B) ​The mean is M = 7. 
C) ​The mean is M = 8. 
D) ​The mean is M=10. 
A) ​The mean is still M = 6. 
B) ​The mean is M = 7. 
C) ​The mean is M = 8. 
D) ​The mean is M=10.

Question 16

It is impossible for the value of the mode to be greater than the value of the mean.​

Accepted Answer

A) True 
 B)False

Question 17

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 18

A sample with a mean of M = 20 has ΣX = 120.There are n = 6 scores in the sample.​

Accepted Answer

A) True 
 B)False

Question 19

A set of n = 6 scores has a mean of M = 10.Another set of scores has n = 4 and M = 15.If these two sets of scores are combined,what is the weighted mean for the combined group?​

Accepted Answer

For the combined sam

Question 20

A sample has a mean of M = 86.If one new person is added to the sample,and ΣX is unchanged,what effect will the addition have on the sample mean?​

Accepted Answer

A) ​The sample mean will increase a little. 
B) ​The sample mean will decrease. 
C) ​The sample mean will remain the same. 
D) ​The sample mean will increase substantially. 
A) ​The sample mean will increase a little. 
B) ​The sample mean will decrease. 
C) ​The sample mean will remain the same. 
D) ​The sample mean will increase substantially.

A sample has a mean of M = 40.If 10 points are added to one of the scores,what happens to the sample mean?

For a 100-point exam,a score of X = 65 is definitely above the median.

A researcher is measuring the amount of time needed to solve a set of anagrams for a sample of n = 15 students.However,one of the participants fails to solve the problems so the researcher has an undetermined score.What is the best measure of central tendency for these data?

One sample has n = 4 scores and M = 10.A second sample has n = 6 scores and M = 5.If the two samples are combined,then what is the weighted mean for the combined sample?

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?

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.

For a negatively skewed distribution,the mean usually has a larger value than either the median or the mode.

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.

There are situations for which it is either impossible to compute a mean or the mean does not provide a central,representative value.

What is the median for the following set of scores? Scores: 1,2,6,11,17

For a negatively skewed distribution with a mean of M = 20,what is the most probable value for the median?

A population of N = 6 scores has ΣX = 30.What is the population mean?

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

What is the mean for the following scores? Scores: 1,6,14

In a sample of n = 6 scores,the smallest score is X = 3,the largest score is X = 10,and the mean is M = 6.If the largest score is changed from X = 10 to X = 22,then what is the value of the new mean?

It is impossible for the value of the mode to be greater than the value of the mean.

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

A sample with a mean of M = 20 has ΣX = 120.There are n = 6 scores in the sample.

A set of n = 6 scores has a mean of M = 10.Another set of scores has n = 4 and M = 15.If these two sets of scores are combined,what is the weighted mean for the combined group?

A sample has a mean of M = 86.If one new person is added to the sample,and ΣX is unchanged,what effect will the addition have on the sample mean?

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

A sample has a mean of M = 40.If 10 points are added to one of the scores,what happens to the sample mean?​

For a 100-point exam,a score of X = 65 is definitely above the median.​

A researcher is measuring the amount of time needed to solve a set of anagrams for a sample of n = 15 students.However,one of the participants fails to solve the problems so the researcher has an undetermined score.What is the best measure of central tendency for these data?​

One sample has n = 4 scores and M = 10.A second sample has n = 6 scores and M = 5.If the two samples are combined,then what is the weighted mean for the combined sample?​

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?​

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.​

For a negatively skewed distribution,the mean usually has a larger value than either the median or the mode.​

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.​

There are situations for which it is either impossible to compute a mean or the mean does not provide a central,representative value.​

What is the median for the following set of scores? Scores: 1,2,6,11,17​

For a negatively skewed distribution with a mean of M = 20,what is the most probable value for the median?​

A population of N = 6 scores has ΣX = 30.What is the population mean?​

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

What is the mean for the following scores? Scores: 1,6,14​

In a sample of n = 6 scores,the smallest score is X = 3,the largest score is X = 10,and the mean is M = 6.If the largest score is changed from X = 10 to X = 22,then what is the value of the new mean?​

It is impossible for the value of the mode to be greater than the value of the mean.​

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

A sample with a mean of M = 20 has ΣX = 120.There are n = 6 scores in the sample.​

A set of n = 6 scores has a mean of M = 10.Another set of scores has n = 4 and M = 15.If these two sets of scores are combined,what is the weighted mean for the combined group?​

A sample has a mean of M = 86.If one new person is added to the sample,and ΣX is unchanged,what effect will the addition have on the sample mean?​

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

A sample has a mean of M = 40.If 10 points are added to one of the scores,what happens to the sample mean?

For a 100-point exam,a score of X = 65 is definitely above the median.

A researcher is measuring the amount of time needed to solve a set of anagrams for a sample of n = 15 students.However,one of the participants fails to solve the problems so the researcher has an undetermined score.What is the best measure of central tendency for these data?

One sample has n = 4 scores and M = 10.A second sample has n = 6 scores and M = 5.If the two samples are combined,then what is the weighted mean for the combined sample?

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?

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.

For a negatively skewed distribution,the mean usually has a larger value than either the median or the mode.

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.

There are situations for which it is either impossible to compute a mean or the mean does not provide a central,representative value.

What is the median for the following set of scores? Scores: 1,2,6,11,17

For a negatively skewed distribution with a mean of M = 20,what is the most probable value for the median?

A population of N = 6 scores has ΣX = 30.What is the population mean?

What is the mean for the following scores? Scores: 1,6,14

In a sample of n = 6 scores,the smallest score is X = 3,the largest score is X = 10,and the mean is M = 6.If the largest score is changed from X = 10 to X = 22,then what is the value of the new mean?

It is impossible for the value of the mode to be greater than the value of the mean.

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

A sample with a mean of M = 20 has ΣX = 120.There are n = 6 scores in the sample.

A set of n = 6 scores has a mean of M = 10.Another set of scores has n = 4 and M = 15.If these two sets of scores are combined,what is the weighted mean for the combined group?

A sample has a mean of M = 86.If one new person is added to the sample,and ΣX is unchanged,what effect will the addition have on the sample mean?