Question 1

The general term for the degree to which scores within a single variable are different from one another is ______.

Accepted Answer

A)  variance 
B)  variability 
C)  standard deviation 
D)  range 
A)  variance 
B)  variability 
C)  standard deviation 
D)  range B

Question 2

You should not use the median for nominal data.

Accepted Answer

A) True 
 B)False  True

Question 3

The sales manager recently collected a dataset containing the number of days that it took each employees to make his/her first sale after being hired. This dataset appears below. Use it to respond to Questions . For all problems, show work.
 $\begin{array}{|l|}
\hline \text { Days } \
\hline 26 \
\hline 23 \
\hline 34 \
\hline 21 \
\hline 31 \
\hline 31 \
\hline 33 \
\hline 27 \
\hline 25 \
\hline 13 \
\hline
\end{array}$
-Calculate the range of this sample.

Accepted Answer

21

Question 4

The sales manager recently collected a dataset containing the number of days that it took each employees to make his/her first sale after being hired. This dataset appears below. Use it to respond to Questions . For all problems, show work.
 $\begin{array}{|l|}
\hline \text { Days } \
\hline 26 \
\hline 23 \
\hline 34 \
\hline 21 \
\hline 31 \
\hline 31 \
\hline 33 \
\hline 27 \
\hline 25 \
\hline 13 \
\hline
\end{array}$
-Calculate the standard deviation of this sample.

Accepted Answer

The answer of The sales manager recently collected a dataset...

Question 5

A systematic inaccuracy in a statistic in measuring what it is intended to measure is considered ______.

Accepted Answer

A)  bias 
B)  variability 
C)  variance 
D)  skew 
A)  bias 
B)  variability 
C)  variance 
D)  skew

Question 6

For the following problems, consider this frequency table of survey data:
 $\begin{array}{|l|l|l|l|}
\hline & F & \text { rel. } f & \text { cum. } f \
\hline \mathbf{1} & 2 & 0.15 & 0.15 \
\hline \mathbf{2} & 3 & 0.23 & 0.38 \
\hline \mathbf{3} & 3 & 0.31 & 0.69 \
\hline \mathbf{4} & 4 & 0.23 & 0.92 \
\hline \mathbf{5} & 1 & 0.08 & 1.00 \
\hline
\end{array}$
-What is the mode of the sample described by this frequency table?

Accepted Answer

The answer of For the following problems, consider this frequency...

Question 7

If the variance is 16, the standard deviation is 8.

Accepted Answer

A) True 
 B)False

Question 8

F1F1F1S1F1F1F10 is the symbol for the variance.

Accepted Answer

A) True 
 B)False

Question 9

Determine the median for the following survey data: 2, 4, 5, 5, 4, 4, 2, 2, 3, 3

Accepted Answer

A)  2.5 
B)  3 
C)  3.5 
D)  4 
A)  2.5 
B)  3 
C)  3.5 
D)  4

Question 10

Determine the standard deviation of the following sample of survey data: 3, 1, 5, 4, 5

Accepted Answer

A)  2.80 
B)  2.24 
C)  1.50 
D)  1.67 
A)  2.80 
B)  2.24 
C)  1.50 
D)  1.67

Question 11

The variance is the squared average distance between all scores in a variable and their mean.

Accepted Answer

A) True 
 B)False

Question 12

Determine x̄ for the following data on sales in British pounds: 369, 599, 381, 701, 694

Accepted Answer

A)  2744 
B)  599 
C)  163.75 
D)  548.8 
A)  2744 
B)  599 
C)  163.75 
D)  548.8

Question 13

The denominator of the variance formula for a population uses N - 1 in order to correct for bias.

Accepted Answer

A) True 
 B)False

Question 14

The arithmetic average of values in a variable is the mode.

Accepted Answer

A) True 
 B)False

Question 15

The sales manager recently collected a dataset containing the number of days that it took each employees to make his/her first sale after being hired. This dataset appears below. Use it to respond to Questions . For all problems, show work.
 $\begin{array}{|l|}
\hline \text { Days } \
\hline 26 \
\hline 23 \
\hline 34 \
\hline 21 \
\hline 31 \
\hline 31 \
\hline 33 \
\hline 27 \
\hline 25 \
\hline 13 \
\hline
\end{array}$
-Calculate the mode of this sample.

Accepted Answer

The answer of The sales manager recently collected a dataset...

Question 16

For the following problems, consider this frequency table of survey data:
 $\begin{array}{|l|l|l|l|}
\hline & F & \text { rel. } f & \text { cum. } f \
\hline \mathbf{1} & 2 & 0.15 & 0.15 \
\hline \mathbf{2} & 3 & 0.23 & 0.38 \
\hline \mathbf{3} & 3 & 0.31 & 0.69 \
\hline \mathbf{4} & 4 & 0.23 & 0.92 \
\hline \mathbf{5} & 1 & 0.08 & 1.00 \
\hline
\end{array}$
-What is the median of the sample described by this frequency table?

Accepted Answer

The answer of For the following problems, consider this frequency...

Question 17

Determine the standard deviation of the following population of survey data: 1, 1, 1, 4, 3

Accepted Answer

A)  1.41 
B)  1.26 
C)  2.00 
D)  1.60 
A)  1.41 
B)  1.26 
C)  2.00 
D)  1.60

Question 18

For the following data, the range is equal to 50: 1, 1, 2, 2, 3, 50

Accepted Answer

A) True 
 B)False

Question 19

Explain why we need to square deviations before calculating the variance of a variable.

Accepted Answer

We square deviations before calculating

Question 20

For the following data, F1F1F1S1F1F1F10F1F1F1S1F1F1F10x2) = 16: 1, 1, 2

Accepted Answer

A) True 
 B)False

The general term for the degree to which scores within a single variable are different from one another is ______.

You should not use the median for nominal data.

A systematic inaccuracy in a statistic in measuring what it is intended to measure is considered ______.

For the following problems, consider this frequency table of survey data: F rel. f cum. f 2 0.15 0.15 3 0.23 0.38 3 0.31 0.69 4 0.23 0.92 1 0.08 1.00 -What is the mode of the sample described by this frequency table?

If the variance is 16, the standard deviation is 8.

 is the symbol for the variance.

Determine the median for the following survey data: 2, 4, 5, 5, 4, 4, 2, 2, 3, 3

Determine the standard deviation of the following sample of survey data: 3, 1, 5, 4, 5

The variance is the squared average distance between all scores in a variable and their mean.

Determine x̄ for the following data on sales in British pounds: 369, 599, 381, 701, 694

The denominator of the variance formula for a population uses N - 1 in order to correct for bias.

The arithmetic average of values in a variable is the mode.

For the following problems, consider this frequency table of survey data: F rel. f cum. f 2 0.15 0.15 3 0.23 0.38 3 0.31 0.69 4 0.23 0.92 1 0.08 1.00 -What is the median of the sample described by this frequency table?

Determine the standard deviation of the following population of survey data: 1, 1, 1, 4, 3

For the following data, the range is equal to 50: 1, 1, 2, 2, 3, 50

Explain why we need to square deviations before calculating the variance of a variable.

For the following data, x²)= 16: 1, 1, 2

The Language of Statistics

Working With Numbers and Data Display

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

Analysis of Variance Anova

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

Exam 3: Central Tendency and Variability

The general term for the degree to which scores within a single variable are different from one another is ______.

You should not use the median for nominal data.

A systematic inaccuracy in a statistic in measuring what it is intended to measure is considered ______.

For the following problems, consider this frequency table of survey data: F rel. f cum. f 2 0.15 0.15 3 0.23 0.38 3 0.31 0.69 4 0.23 0.92 1 0.08 1.00 -What is the mode of the sample described by this frequency table?

If the variance is 16, the standard deviation is 8.

 is the symbol for the variance.

Determine the median for the following survey data: 2, 4, 5, 5, 4, 4, 2, 2, 3, 3

Determine the standard deviation of the following sample of survey data: 3, 1, 5, 4, 5

The variance is the squared average distance between all scores in a variable and their mean.

Determine x̄ for the following data on sales in British pounds: 369, 599, 381, 701, 694

The denominator of the variance formula for a population uses N - 1 in order to correct for bias.

The arithmetic average of values in a variable is the mode.

For the following problems, consider this frequency table of survey data: F rel. f cum. f 2 0.15 0.15 3 0.23 0.38 3 0.31 0.69 4 0.23 0.92 1 0.08 1.00 -What is the median of the sample described by this frequency table?

Determine the standard deviation of the following population of survey data: 1, 1, 1, 4, 3

For the following data, the range is equal to 50: 1, 1, 2, 2, 3, 50

Explain why we need to square deviations before calculating the variance of a variable.

For the following data, x2) = 16: 1, 1, 2

The Language of Statistics

Working With Numbers and Data Display

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

Analysis of Variance Anova

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

For the following data, x²)= 16: 1, 1, 2