Question 1

Data Set 4-7: These are all the scores that exist for an entire group. 1, 0, 5, 6
-The standard deviation of the scores in Data Set 4-7 is

Accepted Answer

A)  2.55 
B)  2.94 
C)  6.50 
D)  8.67 
A)  2.55 
B)  2.94 
C)  6.50 
D)  8.67 A

Question 2

The standard deviation that estimates a population standard deviation from calculations on a sample is

Accepted Answer

A)  $\sigma$ 
B)  $\hat { S }$ 
C)  S. 
A)  $\sigma$ 
B)  $\hat { S }$ 
C)  S. B

Question 3

Data Set 4-7: These are all the scores that exist for an entire group. 1, 0, 5, 6
-The range for Data Set 4-7 is

Accepted Answer

A)  5 
B)  6 
C)  7 
D)  8 
A)  5 
B)  6 
C)  7 
D)  8 B

Question 4

Data Set 4-2: 5, 3, 9, 7, 6
-You can just look at the scores 10, 11, 9, 10, 11, 9 and see that they are ______ than Data Set 4-2.

Accepted Answer

A)  more variable 
B)  less variable 
C)  equally as variable. 
A)  more variable 
B)  less variable 
C)  equally as variable.

Question 5

The sum of squares is

Accepted Answer

A)  X2 
B)  $\Sigma$X2 
C)  ($\Sigma$X)2 
D)  $\Sigma$( $X$ - $\bar { X }$ )2. 
A)  X2 
B)  $\Sigma$X2 
C)  ($\Sigma$X)2 
D)  $\Sigma$( $X$ - $\bar { X }$ )2.

Question 6

The standard deviation of the height of a group of boys and girls aged 3-14 is _______ that of a group aged 13-14.

Accepted Answer

A)  greater than 
B)  less than 
C)  equal to. 
A)  greater than 
B)  less than 
C)  equal to.

Question 7

Data Set 4-2: 5, 3, 9, 7, 6
-If you consider Data Set 4-2 to be a population, the standard deviation is

Accepted Answer

A)  4.00 
B)  2.24 
C)  2.00 
D)  0. 
A)  4.00 
B)  2.24 
C)  2.00 
D)  0.

Question 8

Data Set 4-8: 2, -2, 4, 6
-The value of $\sigma$2 for Data Set 4-8 is

Accepted Answer

A)  2.75 
B)  8.75 
C)  11.67 
A)  2.75 
B)  8.75 
C)  11.67

Question 9

For each set below circle the letter of the more variable group.
-Set 4: Winning team scores

Accepted Answer

A)  baseball games 
B)  football games 
A)  baseball games 
B)  football games

Question 10

The standard deviation of the ages of all children 9 to 11 would be______________the standard deviation of all children aged 1 to 8.

Accepted Answer

A)  less than 
B)  greater than 
C)  equal to. 
A)  less than 
B)  greater than 
C)  equal to.

Question 11

For the scores: 2, 3, 5, 7, the range is

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  none of the other alternatives are correct. 
A)  4 
B)  5 
C)  6 
D)  none of the other alternatives are correct.

Question 12

Find the range, IQR, and $\hat { S }$ $$\begin{array} { c c } 
X & f \
\hline 23 & 1 \
22 & 2 \
21 & 4 \
20 & 4 \
19 & 3 \
18 & 3 \
17 & \underline{1} \
\end{array}$$

Accepted Answer

\[\begin{array}{l}
\begin{array} { l r r

Question 13

Compute the range, $\hat{ S }$ , and $\sigma$ for the scores below. Use the deviation method for $\hat { S }$ and the raw-score method for $\sigma$. Compute IQR. $$\begin{array} { l l } 
X & f \
\hline 4 & 1 \
3 & 4 \
2 & 1 \
1 & 2 \
0 & 2
\end{array}$$

Accepted Answer

None

Question 14

For each set below circle the letter of the more variable group.
-Set 2:

Accepted Answer

A)  The length of airport runways in the U.S. 
B)  The length of highways in the U.S. 
A)  The length of airport runways in the U.S. 
B)  The length of highways in the U.S.

Question 15

Find $\hat { S }$ using the definitional formula, which has $\Sigma ( X - \bar { X } ) ^ { 2 }$ in the numerator.
-Scores:5, 4, 3, 2, 1

Accepted Answer

The answer of Find $\hat { S }$ using the...

Question 16

The variance isthe standard deviation.

Accepted Answer

A)  the sum of 
B)  the square of 
C)  the square root of 
D)  twice as large as. 
A)  the sum of 
B)  the square of 
C)  the square root of 
D)  twice as large as.

Question 17

"Hummph,"wheezed Professor Glarance Downsnout, "the Registrar said this year's Freshmen had higher ACT scores on average than last year's, but I declare, I have more duds than ever before."Suppose that the statement is true and that the Professor's students are representative of the whole class. Write an explanation of how this could be, using the concepts in Chapter 4.

Accepted Answer

Although the mean may be highe

Question 18

One of the characteristics of high quality manufacturing is consistency. To compare manufacturers, choose an important part and measure four of them from each manufacturer. Suppose the hypothetical measurements below (in millimeters) are samples of the same part manufactured by three sound system companies. Analyze the data and write a sentence about the three manufacturers. This is a case where you need to carry four decimal places in your work. $$\begin{array} { l l l l l } 
\text { Pioneer } & 25.1 & 24.7 & 24.9 & 25.3 \
\text { Sony } & 25.1 & 24.9 & 25.1 & 24.9 \
\text { JVC } & 25.2 & 25.3 & 24.7 & 24.8
\end{array}$$

Accepted Answer

because the purpose of the measurements

Question 19

Compute the range for the following scores: 2.6 , 3.9 , 6.8 , 5.0 , 2.4 , 5.5 , 7.1

Accepted Answer

range = 6.

Question 20

Data Set 4-8: 2, -2, 4, 6
-For Data Set 4-8, the range is

Accepted Answer

A)  4 
B)  5 
C)  8 
D)  9. 
A)  4 
B)  5 
C)  8 
D)  9.

Data Set 4-7: These are all the scores that exist for an entire group. 1, 0, 5, 6 -The standard deviation of the scores in Data Set 4-7 is

The standard deviation that estimates a population standard deviation from calculations on a sample is

Data Set 4-7: These are all the scores that exist for an entire group. 1, 0, 5, 6 -The range for Data Set 4-7 is

Data Set 4-2: 5, 3, 9, 7, 6 -You can just look at the scores 10, 11, 9, 10, 11, 9 and see that they are ______ than Data Set 4-2.

The sum of squares is

The standard deviation of the height of a group of boys and girls aged 3-14 is _______ that of a group aged 13-14.

Data Set 4-2: 5, 3, 9, 7, 6 -If you consider Data Set 4-2 to be a population, the standard deviation is

Data Set 4-8: 2, -2, 4, 6 -The value of $\sigma$ ²for Data Set 4-8 is

For each set below circle the letter of the more variable group. -Set 4: Winning team scores

The standard deviation of the ages of all children 9 to 11 would be______________the standard deviation of all children aged 1 to 8.

For the scores: 2, 3, 5, 7, the range is

Find the range, IQR, and $\hat { S }$ X f 23 1 22 2 21 4 20 4 19 3 18 3 17

Compute the range, $\hat{ S }$ , and $\sigma$ for the scores below. Use the deviation method for $\hat { S }$ and the raw-score method for $\sigma$ . Compute IQR. X f 4 1 3 4 2 1 1 2 0 2

For each set below circle the letter of the more variable group. -Set 2:

Find $\hat { S }$ using the definitional formula, which has $\Sigma ( X - \bar { X } ) ^ { 2 }$ in the numerator. -Scores:5, 4, 3, 2, 1

The variance isthe standard deviation.

Compute the range for the following scores: 2.6 , 3.9 , 6.8 , 5.0 , 2.4 , 5.5 , 7.1

Data Set 4-8: 2, -2, 4, 6 -For Data Set 4-8, the range is

Introduction

Exploring Data: Frequency Distributions and Graphs

Exploring Data: Central Tendency

Other Descriptive Statistics

Correlation and Regression

Theoretical Distributions Including the Normal Distribution

Samples, Sampling Distributions, and Confidence Intervals

Hypothesis Testing and Effect Size: One-Sample Designs

Hypothesis Testing, Effect Size, and and Confidence Intervals: Two-Sample Designs

Analysis of Variance: One-Way Classification

Analysis of Variance: One-Factor Repeated Measures

Analysis of Variance: Factorial Design

Chi Square Tests

More Nonparametric Tests

Appendix: Grouped Frequency Distributions and Central Tendency

Filters

Exam 4: Exploring Data: Variability

Data Set 4-7: These are all the scores that exist for an entire group. 1, 0, 5, 6 -The standard deviation of the scores in Data Set 4-7 is

The standard deviation that estimates a population standard deviation from calculations on a sample is

Data Set 4-7: These are all the scores that exist for an entire group. 1, 0, 5, 6 -The range for Data Set 4-7 is

Data Set 4-2: 5, 3, 9, 7, 6 -You can just look at the scores 10, 11, 9, 10, 11, 9 and see that they are ______ than Data Set 4-2.

The sum of squares is

The standard deviation of the height of a group of boys and girls aged 3-14 is _______ that of a group aged 13-14.

Data Set 4-2: 5, 3, 9, 7, 6 -If you consider Data Set 4-2 to be a population, the standard deviation is

Data Set 4-8: 2, -2, 4, 6 -The value of σ\sigmaσ 2 for Data Set 4-8 is

For each set below circle the letter of the more variable group. -Set 4: Winning team scores

The standard deviation of the ages of all children 9 to 11 would be______________the standard deviation of all children aged 1 to 8.

For the scores: 2, 3, 5, 7, the range is

Find the range, IQR, and S^\hat { S }S^ X f 23 1 22 2 21 4 20 4 19 3 18 3 17

Compute the range, S^\hat{ S }S^ , and σ\sigmaσ for the scores below. Use the deviation method for S^\hat { S }S^ and the raw-score method for σ\sigmaσ . Compute IQR. X f 4 1 3 4 2 1 1 2 0 2

For each set below circle the letter of the more variable group. -Set 2:

Find S^\hat { S }S^ using the definitional formula, which has Σ(X−Xˉ)2\Sigma ( X - \bar { X } ) ^ { 2 }Σ(X−Xˉ)2 in the numerator. -Scores:5, 4, 3, 2, 1

The variance isthe standard deviation.

Compute the range for the following scores: 2.6 , 3.9 , 6.8 , 5.0 , 2.4 , 5.5 , 7.1

Data Set 4-8: 2, -2, 4, 6 -For Data Set 4-8, the range is

Introduction

Exploring Data: Frequency Distributions and Graphs

Exploring Data: Central Tendency

Other Descriptive Statistics

Correlation and Regression

Theoretical Distributions Including the Normal Distribution

Samples, Sampling Distributions, and Confidence Intervals

Hypothesis Testing and Effect Size: One-Sample Designs

Hypothesis Testing, Effect Size, and and Confidence Intervals: Two-Sample Designs

Analysis of Variance: One-Way Classification

Analysis of Variance: One-Factor Repeated Measures

Analysis of Variance: Factorial Design

Chi Square Tests

More Nonparametric Tests

Appendix: Grouped Frequency Distributions and Central Tendency

Filters

Data Set 4-8: 2, -2, 4, 6 -The value of $\sigma$ ²for Data Set 4-8 is

Find the range, IQR, and $\hat { S }$ X f 23 1 22 2 21 4 20 4 19 3 18 3 17

Compute the range, $\hat{ S }$ , and $\sigma$ for the scores below. Use the deviation method for $\hat { S }$ and the raw-score method for $\sigma$ . Compute IQR. X f 4 1 3 4 2 1 1 2 0 2

Find $\hat { S }$ using the definitional formula, which has $\Sigma ( X - \bar { X } ) ^ { 2 }$ in the numerator. -Scores:5, 4, 3, 2, 1