Question 1

Consider the data set that consists of: 10, 20, 32, 35, 44, 30, 60, 11. The value 31 is the…

Accepted Answer

A)  median only. 
B)  median and mean. 
C)  median, mode, and mean. 
D)  mean only. 
A)  median only. 
B)  median and mean. 
C)  median, mode, and mean. 
D)  mean only.

Question 2

A trimmed mean is the mean without the top and bottom ______ of the data included in the calculation

Accepted Answer

A)  5% 
B)  1% 
C)  10% 
D)  5 observations 
A)  5% 
B)  1% 
C)  10% 
D)  5 observations

Question 3

Given the dataset, what is x̅? 104, 102, 109, 95, 102, 98, 101, 97, 92, 94, 119, 102

Accepted Answer

A)  102. 
B)  101.25 
C)  101.5 
D)  27 
A)  102. 
B)  101.25 
C)  101.5 
D)  27

Question 4

How many minutes of television do children watch at home? A researcher surveyed parents and asked them to report the number of minutes per day children spend watching tv. The data are below
 $\begin{array}{llcc}
 \hline \text {Minutes on  } &  \
 \text { TV } &\
\hline 55 \
80 \
75 \
90 \
120 \
40 \
30 \
20 \
60 \
40 \
50 \
120 \
80 \
50 \
60 \
40 \
40 \
50 \
70 \
40 \
\hline
\end{array}$
 Based on the three measures of center, what kind of shape do you expect the distribution to have?

Accepted Answer

The answer of How many minutes of television do children...

Question 5

Below are income data for individuals who participated in a recent study.
This data set contains information about the number of hours safe students studied before taking a recent exam. Using this information, answer questions.
What is the mode?
 $$\begin{array} { c c } 
\hline \text { Income } & f \
\hline 100000 - 109999 & 9 \
90000 - 99999 & 12 \
80000 - 89999 & 33 \
70000 - 79999 & 21 \
60000 - 69999 & 56 \
50000 - 59999 & 24 \
40000 - 49999 & 19 \
30000 - 39999 & 42 \
20000 - 29999 & 17 \
10000 - 19999 & 6 \
\hline
\end{array}$$

Accepted Answer

The answer of Below are income data for individuals who...

Question 6

In a perfectly uni-modal distribution with perfectly symmetric sides around the mode, which of the following is true?

Accepted Answer

A)  The mean and median are different values from the mode 
B)  The mean, median, and mode share the same value. 
C)  The distribution has three different values for mean, median, and mode. 
D)  Any of the above can be true. There is insufficient information to tell. 
A)  The mean and median are different values from the mode 
B)  The mean, median, and mode share the same value. 
C)  The distribution has three different values for mean, median, and mode. 
D)  Any of the above can be true. There is insufficient information to tell.

Question 7

of the three measures of central tendency, only the mode is useful for certain types of data, like those on a nominal scale.

Accepted Answer

A) True 
 B)False

Question 8

A unimodal distribution is always a normal distribution

Accepted Answer

A) True 
 B)False

Question 9

Outliers are defined strictly as scores that are much higher or larger than the rest of the dataset

Accepted Answer

A) True 
 B)False

Question 10

The mean, median, and mode of a dataset can be used to describe both qualitative and quantitative data meaningfully.

Accepted Answer

A) True 
 B)False

Question 11

Below are income data for individuals who participated in a recent study.
This data set contains information about the number of hours safe students studied before taking a recent exam. Using this information, answer questions.
 $$\begin{array} { c c } 
\hline \text { Income } & f \
\hline 100000 - 109999 & 9 \
90000 - 99999 & 12 \
80000 - 89999 & 33 \
70000 - 79999 & 21 \
60000 - 69999 & 56 \
50000 - 59999 & 24 \
40000 - 49999 & 19 \
30000 - 39999 & 42 \
20000 - 29999 & 17 \
10000 - 19999 & 6 \
\hline
\end{array}$$ What is the median?

Accepted Answer

The answer of Below are income data for individuals who...

Question 12

The following data represent the number of children people have.
$\begin{array}{cc}
\hline  \text {  Number of } &  \
 \text {Kids  } &\
\hline 2 \
1 \
4 \
3 \
3 \
2 \
4 \
1 \
1 \
1 \
2 \
3 \
1 \
4 \
2 \
3 \
2 \
1 \
5 \
1 \
2 \
3 \
1 \
1 \
\hline
\end{array}$
 What is the mean?

Accepted Answer

A)  2 
B)  2.1 
C)  1 
D)  2.2 
A)  2 
B)  2.1 
C)  1 
D)  2.2

Question 13

A normal distribution is unimodal and symmetric.

Accepted Answer

A) True 
 B)False

Question 14

A researcher who is examining stress-related hormones has data on indivdiuals' body mass index. Below are the data
 $$\begin{array} { c c } 
\hline \text { BMI } & f \
\hline 18 & 4 \
19 & 11 \
20 & 6 \
21 & 24 \
22 & 39 \
23 & 33 \
24 & 35 \
25 & 39 \
26 & 41 \
27 & 36 \
28 & 22 \
29 & 16 \
30 & 19 \
\hline
\end{array}$$ What is the average body mass index in this sample?

Accepted Answer

The answer of A researcher who is examining stress-related hormones...

Question 15

If you have a dataset with 95 observations, and you pick one and add 5 to it, which of the following is most likely to change?

Accepted Answer

A)  The mean will change 
B)  The median will change 
C)  The mode will change 
D)  The mean, median, and mode all have the same likelihood of changing 
A)  The mean will change 
B)  The median will change 
C)  The mode will change 
D)  The mean, median, and mode all have the same likelihood of changing

Question 16

A trimmed mean can be appropriate used when the data is heavily skewed

Accepted Answer

A) True 
 B)False

Question 17

Imagine in a data set where the smallest value is not the mode. Now imagine if that smallest value decreases by 50. Everything else about the data set remains the same. Which of the following must be true?

Accepted Answer

A)  The mean decreases 
B)  The mean increases 
C)  The median and mean decreases 
D)  The mean and median decreases, but the mode remains constant. 
A)  The mean decreases 
B)  The mean increases 
C)  The median and mean decreases 
D)  The mean and median decreases, but the mode remains constant.

Question 18

A researcher is running an experiment with two conditions. One in which she asks participants to bite into an apple when remembering a list of words to prevent them from rehearsing the words (i.e., saying them aid memory) and another group where they do not bite into an apple. Below are the data showing the number of words participants were able to recall out of 30.
 $$\begin{array} { c c c c } 
\hline \text { Bite } & f & \text { NoBite } & f \
\hline 5 & 11 & 5 & 4 \
6 & 8 & 6 & 5 \
7 & 14 & 7 & 6 \
8 & 12 & 8 & 14 \
9 & 15 & 9 & 13 \
10 & 16 & 10 & 12 \
11 & 5 & 11 & 15 \
12 & 6 & 12 & 8 \
13 & 3 & 13 & 4 \
14 & 2 & 14 & 9 \
15 & 1 & 15 & 2 \
16 & 0 & 16 & 0 \
17 & 0 & 17 & 1 \
\hline
\end{array}$$ What was the mode of each group?

Accepted Answer

Biting an

Consider the data set that consists of: 10, 20, 32, 35, 44, 30, 60, 11. The value 31 is the…

A trimmed mean is the mean without the top and bottom ______ of the data included in the calculation

Given the dataset, what is x̅? 104, 102, 109, 95, 102, 98, 101, 97, 92, 94, 119, 102

In a perfectly uni-modal distribution with perfectly symmetric sides around the mode, which of the following is true?

of the three measures of central tendency, only the mode is useful for certain types of data, like those on a nominal scale.

A unimodal distribution is always a normal distribution

Outliers are defined strictly as scores that are much higher or larger than the rest of the dataset

The mean, median, and mode of a dataset can be used to describe both qualitative and quantitative data meaningfully.

The following data represent the number of children people have. Number of Kids 2 1 4 3 3 2 4 1 1 1 2 3 1 4 2 3 2 1 5 1 2 3 1 1 What is the mean?

A normal distribution is unimodal and symmetric.

A researcher who is examining stress-related hormones has data on indivdiuals' body mass index. Below are the data BMI f 18 4 19 11 20 6 21 24 22 39 23 33 24 35 25 39 26 41 27 36 28 22 29 16 30 19 What is the average body mass index in this sample?

If you have a dataset with 95 observations, and you pick one and add 5 to it, which of the following is most likely to change?

A trimmed mean can be appropriate used when the data is heavily skewed

Imagine in a data set where the smallest value is not the mode. Now imagine if that smallest value decreases by 50. Everything else about the data set remains the same. Which of the following must be true?

Introduction: Statistics--Who Needs Them

Types of Data

A Picture Is Worth a Thousand Words: Creating and Interpreting Graphics

Variability: the Law of Life

Where Am I Normal Distributions and Standard Scores

Basic Probability Theory

The Central Limit Theorem and Hypothesis Testing

The Z-Test

The T-Test

Analysis of Variance

Confidence Intervals and Effect Size: Building a Better Mousetrap

Correlation and Regression: Are We Related

The Chi-Square Test

Non-Parametric Tests

Which Test Should I Use and Why

Filters

Exam 4: Measures of Central Tendency: Whats so Average About the Mean

Consider the data set that consists of: 10, 20, 32, 35, 44, 30, 60, 11. The value 31 is the…

A trimmed mean is the mean without the top and bottom ______ of the data included in the calculation

Given the dataset, what is x̅? 104, 102, 109, 95, 102, 98, 101, 97, 92, 94, 119, 102

In a perfectly uni-modal distribution with perfectly symmetric sides around the mode, which of the following is true?

of the three measures of central tendency, only the mode is useful for certain types of data, like those on a nominal scale.

A unimodal distribution is always a normal distribution

Outliers are defined strictly as scores that are much higher or larger than the rest of the dataset

The mean, median, and mode of a dataset can be used to describe both qualitative and quantitative data meaningfully.

The following data represent the number of children people have. Number of Kids 2 1 4 3 3 2 4 1 1 1 2 3 1 4 2 3 2 1 5 1 2 3 1 1 What is the mean?

A normal distribution is unimodal and symmetric.

A researcher who is examining stress-related hormones has data on indivdiuals' body mass index. Below are the data BMI f 18 4 19 11 20 6 21 24 22 39 23 33 24 35 25 39 26 41 27 36 28 22 29 16 30 19 What is the average body mass index in this sample?

If you have a dataset with 95 observations, and you pick one and add 5 to it, which of the following is most likely to change?

A trimmed mean can be appropriate used when the data is heavily skewed

Imagine in a data set where the smallest value is not the mode. Now imagine if that smallest value decreases by 50. Everything else about the data set remains the same. Which of the following must be true?

Introduction: Statistics--Who Needs Them

Types of Data

A Picture Is Worth a Thousand Words: Creating and Interpreting Graphics

Variability: the Law of Life

Where Am I Normal Distributions and Standard Scores

Basic Probability Theory

The Central Limit Theorem and Hypothesis Testing

The Z-Test

The T-Test

Analysis of Variance

Confidence Intervals and Effect Size: Building a Better Mousetrap

Correlation and Regression: Are We Related

The Chi-Square Test

Non-Parametric Tests

Which Test Should I Use and Why

Filters