Question 1

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

Accepted Answer

A) ​N = 6/42 = 1/7 
B) ​N = 42/6 = 7 
C) ​N=42 
D) ​N = 6*42 = 252 
A) ​N = 6/42 = 1/7 
B) ​N = 42/6 = 7 
C) ​N=42 
D) ​N = 6*42 = 252 B

Question 2

Figure 3.1
-Find the mean,the median,and the mode for the set of scores in the accompanying frequency distribution histogram,Figure 3.1.​

Accepted Answer

Mean = 28/10 = 2.80.By simply counting,the median = 3.The precise median is 2.75.Mode = 3​

Question 3

Every dataset will have a mode.​

Accepted Answer

A) True 
 B)False  False

Question 4

What is the value of the median for the following set of scores? Scores: 1,3,4,6,7,8,12,23​

Accepted Answer

A) ​6 
B) ​6.5 
C) ​7 
D) ​8 
A) ​6 
B) ​6.5 
C) ​7 
D) ​8

Question 5

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) ​equal to 25 
C) ​between 20 and 25 
D) ​less than 20 
A) ​greater than 25 
B) ​equal to 25 
C) ​between 20 and 25 
D) ​less than 20

Question 6

What is the purpose for obtaining a measure of central tendency?​

Accepted Answer

The purpose of a measure of ce

Question 7

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

Accepted Answer

A) ​No score is exactly equal to the mean. 
B) ​No score is exactly equal to the median. 
C) ​At least one score is exactly equal to the mode. 
D) ​At least one score is equal to the median. 
A) ​No score is exactly equal to the mean. 
B) ​No score is exactly equal to the median. 
C) ​At least one score is exactly equal to the mode. 
D) ​At least one score is equal to the median.

Question 8

A sample has n = 7 scores with a mean of M = 7.If one individual with a score of X = 1 is removed from the sample,the new mean will be M = 8.​

Accepted Answer

A) True 
 B)False

Question 9

A population of scores has a mean of µ = 26,a median of 23,and a mode of 22.What is the most likely shape for the population distribution?​

Accepted Answer

A) ​symmetrical 
B) ​positively skewed 
C) ​negatively skewed 
D) ​bimodal 
A) ​symmetrical 
B) ​positively skewed 
C) ​negatively skewed 
D) ​bimodal

Question 10

A population of N = 7 scores has a mean of µ = 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=11.7 
B) ​66/6=11.0 
C) ​70/7=10.0 
D) ​66/7=9.4 
A) ​70/6=11.7 
B) ​66/6=11.0 
C) ​70/7=10.0 
D) ​66/7=9.4

Question 11

Adding a new score to a distribution will always change the value of the mean.

Accepted Answer

A) True 
 B)False

Question 12

One item on a questionnaire asks students how many times in a typical week they eat at a fast-food restaurant.The responses for a sample of n = 10 students are summarized in the frequency distribution.What is the best measure of central tendency for these data??? $$\begin{array} { c c } 
\mathrm { X } & \mathrm { f } \
5 \text { or more } & 2 \
4 & 3 \
3 & 2 \
2 & 1 \
1 & 1 \
0 & 1
\end{array}$$ ?

Accepted Answer

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

Question 13

The major mode occurs with less frequency than the minor mode.​

Accepted Answer

A) True 
 B)False

Question 14

For a perfectly symmetrical distribution with a median of 30,what is the value of the mean?​

Accepted Answer

A) ​greater than 30 
B) ​30 
C) ​20 to 29.5 
D) ​less than 20 
A) ​greater than 30 
B) ​30 
C) ​20 to 29.5 
D) ​less than 20

Question 15

A population has a mean of µ = 30.If 3 points are added to each score,what is the mean for the new distribution?​

Accepted Answer

A) 3​ 
B) ​27 
C) ​30 
D) ​33 
A) 3​ 
B) ​27 
C) ​30 
D) ​33

Question 16

After every score in a sample is multiplied by 3,the mean is calculated and found to be M = 21.What was the mean for the original scores?​

Accepted Answer

A) ​7 
B) ​3 
C) ​21 
D) ​63 
A) ​7 
B) ​3 
C) ​21 
D) ​63

Question 17

For a distribution with one or two extreme scores,the median is usually a more representative value than the mean.​

Accepted Answer

A) True 
 B)False

Question 18

The mean is considered to be the "balance point" for a distribution because exactly half of the scores are located above the mean and exactly half are below the mean.​

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

A sample with modes of 4,8,and 10 is said to be multimodal.​

Accepted Answer

A) True 
 B)False

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

Figure 3.1 -Find the mean,the median,and the mode for the set of scores in the accompanying frequency distribution histogram,Figure 3.1.

Every dataset will have a mode.

What is the value of the median for the following set of scores? Scores: 1,3,4,6,7,8,12,23

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?

What is the purpose for obtaining a measure of central tendency?

Which of the following statements is true for a distribution of scores?

A sample has n = 7 scores with a mean of M = 7.If one individual with a score of X = 1 is removed from the sample,the new mean will be M = 8.

A population of scores has a mean of µ = 26,a median of 23,and a mode of 22.What is the most likely shape for the population distribution?

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

Adding a new score to a distribution will always change the value of the mean.

One item on a questionnaire asks students how many times in a typical week they eat at a fast-food restaurant.The responses for a sample of n = 10 students are summarized in the frequency distribution.What is the best measure of central tendency for these data??? 5 or more 2 4 3 3 2 2 1 1 1 0 1 ?

The major mode occurs with less frequency than the minor mode.

For a perfectly symmetrical distribution with a median of 30,what is the value of the mean?

A population has a mean of µ = 30.If 3 points are added to each score,what is the mean for the new distribution?

After every score in a sample is multiplied by 3,the mean is calculated and found to be M = 21.What was the mean for the original scores?

For a distribution with one or two extreme scores,the median is usually a more representative value than the mean.

The mean is considered to be the "balance point" for a distribution because exactly half of the scores are located above the mean and exactly half are below the mean.

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

A sample with modes of 4,8,and 10 is said to be multimodal.

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

Figure 3.1 -Find the mean,the median,and the mode for the set of scores in the accompanying frequency distribution histogram,Figure 3.1.​

Every dataset will have a mode.​

What is the value of the median for the following set of scores? Scores: 1,3,4,6,7,8,12,23​

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?​

What is the purpose for obtaining a measure of central tendency?​

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

A sample has n = 7 scores with a mean of M = 7.If one individual with a score of X = 1 is removed from the sample,the new mean will be M = 8.​

A population of scores has a mean of µ = 26,a median of 23,and a mode of 22.What is the most likely shape for the population distribution?​

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

Adding a new score to a distribution will always change the value of the mean.

One item on a questionnaire asks students how many times in a typical week they eat at a fast-food restaurant.The responses for a sample of n = 10 students are summarized in the frequency distribution.What is the best measure of central tendency for these data??? 5 or more 2 4 3 3 2 2 1 1 1 0 1 ?

The major mode occurs with less frequency than the minor mode.​

For a perfectly symmetrical distribution with a median of 30,what is the value of the mean?​

A population has a mean of µ = 30.If 3 points are added to each score,what is the mean for the new distribution?​

After every score in a sample is multiplied by 3,the mean is calculated and found to be M = 21.What was the mean for the original scores?​

For a distribution with one or two extreme scores,the median is usually a more representative value than the mean.​

The mean is considered to be the "balance point" for a distribution because exactly half of the scores are located above the mean and exactly half are below the mean.​

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

A sample with modes of 4,8,and 10 is said to be multimodal.​

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

Figure 3.1 -Find the mean,the median,and the mode for the set of scores in the accompanying frequency distribution histogram,Figure 3.1.

Every dataset will have a mode.

What is the value of the median for the following set of scores? Scores: 1,3,4,6,7,8,12,23

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?

What is the purpose for obtaining a measure of central tendency?

Which of the following statements is true for a distribution of scores?

A sample has n = 7 scores with a mean of M = 7.If one individual with a score of X = 1 is removed from the sample,the new mean will be M = 8.

A population of scores has a mean of µ = 26,a median of 23,and a mode of 22.What is the most likely shape for the population distribution?

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

The major mode occurs with less frequency than the minor mode.

For a perfectly symmetrical distribution with a median of 30,what is the value of the mean?

A population has a mean of µ = 30.If 3 points are added to each score,what is the mean for the new distribution?

After every score in a sample is multiplied by 3,the mean is calculated and found to be M = 21.What was the mean for the original scores?

For a distribution with one or two extreme scores,the median is usually a more representative value than the mean.

The mean is considered to be the "balance point" for a distribution because exactly half of the scores are located above the mean and exactly half are below the mean.

A sample with modes of 4,8,and 10 is said to be multimodal.