Question 1

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)  ​19.2E) A) and B)
F) None of the above

Question 2

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 3

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

Accepted Answer

A) True 
 B)False

Question 4

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 5

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.E) B) and C)
F) A) and D)

Question 6

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

Accepted Answer

A)  ​20
B)  ​10
C)  ​5
D)  ​4E) All of the above
F) B) and D)

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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 = 15E) B) and D)
F) All of the above

Question 9

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=11.0E) B) and C)
F) None of the above

Question 10

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 11

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 12

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 = 8E) A) and B)
F) All of the above

Question 13

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 14

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)  ​0E) A) and B)
F) A) and C)

Question 15

What is the mean for the population of scores shown in the frequency distribution table??  Xf5142332412\begin{array} { l l } \mathrm { X } & \mathrm { f } \\hline 5 & 1 \4 & 2 \3 & 3 \2 & 4 \1 & 2 \\hline\end{array}X54321​f12342​​

Accepted Answer

A)  15/5 = 3?
B)  ?15/12 = 1.25
C)  ?32/5 = 6.60
D)  ?32/12 = 2.67 E) B) and D)
F) B) and C)

Question 16

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)  ​3E) A) and D)
F) All of the above

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

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 meanE) All of the above
F) None of the above

Question 19

A distribution with two modes is said to be:​

Accepted Answer

A)  ​two modal
B)  ​minor modal
C)  ​bimodal
D)  ​main modalE) None of the above
F) All of the above

Question 20

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.E) B) and D)
F) A) and B)

Exam 3: Central Tendency

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

Correct AnswerverifiedShow Answer

Compute the mean,median,and mode for the set of scores shown in the following frequency distribution table.​ Xf71625344312011\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}X7654321​f1234101​​

Correct AnswerverifiedThe mean is 54/12 = ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.​

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.​

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the mean for the population of scores shown in the frequency distribution table?? Xf5142332412\begin{array} { l l } \mathrm { X } & \mathrm { f } \\\hline 5 & 1 \\4 & 2 \\3 & 3 \\2 & 4 \\1 & 2 \\\hline\end{array}X54321​f12342​​

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?​

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?​

Correct AnswerverifiedShow Answer

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?​

Correct AnswerverifiedShow Answer

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?​

Correct AnswerverifiedShow Answer

A distribution with two modes is said to be:​

Correct AnswerverifiedShow Answer

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

Correct Answer
verified

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

Correct Answer
verified
The mean is 54/12 = ...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

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.

Correct Answer
verified

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

Correct Answer
verified

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.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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?

Correct Answer
verified

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?

Correct Answer
verified

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?

Correct Answer
verified

A distribution with two modes is said to be:

Correct Answer
verified