Using the following data,describe the shape of the data distribution. $\begin{array}{llllllll} \text { 1. } & 11.5 & 6 . & 13.7 & 11 . & 11.0 & 16 . & 14.5 \\ \text { 2. } & 13.5 & 7 . & 14.0 & 12 . & 13.0 & 17 . & 15.5 \\ \text { 3. } & 12.5 & 8 . & 12.0 & 13 . & 16.7 & 18 . & 13.0 \\ \text { 4. } & 15.2 & 9 . & 12.7 & 14 . & 12.5 & 19 . & 18.2 \\ \text { 5. } & 14.7 & 10 . & 12.5 & 15 . & 11.5 & 20 . & 11.7 \end{array}$

A) Skewed to the left B) Bimodal C) Normal D) Skewed to the right A) Skewed to the left B) Bimodal C) Normal D) Skewed to the right D

Using the following data,what would be the leaf unit in a stem-and-leaf display? $\begin{array}{llllllll} \text { 1. } & 11.5 & 6 . & 13.7 & 11 . & 11 & 16 . & 14.5 \\ \text { 2. } & 13.5 & 7 . & 14 & 12 . & 13 & 17 . & 15.5 \\ \text { 3. } & 12.5 & 8 . & 12 & 13 . & 16.7 & 18 . & 13 \\ \text { 4. } & 15.2 & 9 . & 12.7 & 14 . & 12.5 & 19 . & 18.2 \\ \text { 5. } & 14.7 & 10 . & 12.5 & 15 . & 11.5 & 20 . & 11.7 \end{array}$

A) 1.0 B) 10 C) .10 D) .01 E) .20 A) 1.0 B) 10 C) .10 D) .01 E) .20

A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. $\begin{array} { l l } 5 & 269 \\ 6 & 255568999 \\ 7 & 11224557789 \\ 8 & 001222458 \\ 9 & 02455679 \\ 10 & 1556 \\ 11 & 137 \\ 12 & \\ 13 & 255 \end{array}$ What is the approximate shape of the distribution of the data?

A) Normal B) Skewed to the right C) Skewed to the left D) Bimodal E) Uniform A) Normal B) Skewed to the right C) Skewed to the left D) Bimodal E) Uniform

At the end of their final exam,550 students answered an additional question in which they rated their instructor's teaching effectiveness,with the following results. $ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$ \quad$$\text { Student's Rating of Instructor }$ $\begin{array} { | c | c | c | } \hline \begin{array} { c } \text { Student's } \\ \text { Final Grade } \end{array} & \text { Very or Somewhat Effective } & \text { Very or Somewhat Ineffective } \\ \hline \text { A } & 190 & 85 \\ \hline \text { B } & 75 & 120 \\ \hline \text { C } & 20 & 17 \\ \hline \text { D } & 9 & 18 \\ \hline \text { F } & 1 & 15 \\ \hline \end{array}$ What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

A) 0.345 B) 0.254 C) 0.482 D) 0.898 E) 0.644 A) 0.345 B) 0.254 C) 0.482 D) 0.898 E) 0.644

Exam 2: Descriptive Statistics: Tabular and Graphical Methods

Using the following data,describe the shape of the data distribution. 1. 11.5 6. 13.7 11. 11.0 16. 14.5 2. 13.5 7. 14.0 12. 13.0 17. 15.5 3. 12.5 8. 12.0 13. 16.7 18. 13.0 4. 15.2 9. 12.7 14. 12.5 19. 18.2 5. 14.7 10. 12.5 15. 11.5 20. 11.7

Free

(Multiple Choice)

4.7/5

(39)

Question 1

Correct Answer:

Verified

D

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 Construct a stem-and-leaf plot.

Free

(Essay)

4.8/5

(28)

Question 2

Correct Answer:

Verified

$\begin{array} { l } \text { Stem-and-leaf of Sales Calls } \\\mathrm { N } = 25 \\\text { Leaf Unit } = 1.0 \\\begin{array} { l l l } 1 & 2 & 4 \\7 & 2 & 778899 \\12 & 3 & 11334 \\( 5 ) & 3 & 57788 \\8 & 4 & 0134 \\4 & 4 & 68 \\2 & 5 & 0 \\1 & 5 & 6\end{array}\end{array}$ Feedback:The stem should be split and consist of 20,30,40,and 50.Leaves are the single units for the number of sales calls .

Splitting the stems refers to assigning the same stem to two or more rows of the stem-and-leaf display.

Free

(True/False)

4.7/5

(37)

Question 3

Correct Answer:

Verified

True

A Stem-and-leaf display is best used to ___________.

(Multiple Choice)

4.9/5

(39)

Question 4

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months.Construct a dot plot of these data and describe the distribution. 5,1,4,8,0,6,3,5,3,4,7,15,5,8,2,1,5,4

(Essay)

4.9/5

(34)

Question 5

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 Construct a frequency polygon.

(Essay)

4.8/5

(35)

Question 6

Which of the following graphical tools is not used to study the shapes of distributions?

(Multiple Choice)

4.8/5

(32)

Question 7

Using the following data,what would be the leaf unit in a stem-and-leaf display? 1. 11.5 6. 13.7 11. 11 16. 14.5 2. 13.5 7. 14 12. 13 17. 15.5 3. 12.5 8. 12 13. 16.7 18. 13 4. 15.2 9. 12.7 14. 12.5 19. 18.2 5. 14.7 10. 12.5 15. 11.5 20. 11.7

(Multiple Choice)

4.8/5

(36)

Question 8

A ______________ shows the relationship between two variables.

(Multiple Choice)

4.8/5

(30)

Question 9

A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. 5 269 6 255568999 7 11224557789 8 001222458 9 02455679 10 1556 11 137 12 13 255 What is the approximate shape of the distribution of the data?

(Multiple Choice)

4.9/5

(38)

Question 10

In the first step of setting up a Pareto chart,a frequency table should be constructed of the defects (or categories)in decreasing order of frequency.

(True/False)

4.8/5

(34)

Question 11

When establishing the classes for a frequency table,it is generally agreed that the more classes you use the better your frequency table will be.

(True/False)

4.9/5

(36)

Question 12

Fill in the missing components of the following frequency distribution constructed for a sample size of 50.

(Essay)

4.8/5

(40)

Question 13

A local electronics retailer recently conducted a study on purchasers of large screen televisions.The study recorded the type of television and the credit account balance of the customer at the time of purchase.They obtained the following results.

(Essay)

4.9/5

(39)

Question 14

A(n)______ is a graph of a cumulative distribution.

(Multiple Choice)

4.8/5

(30)

Question 15

A bar chart is a graphic that can be used to depict qualitative data.

(True/False)

4.8/5

(36)

Question 16

If there are 62 values in a data set,how many classes should be created for a frequency histogram?

(Multiple Choice)

4.9/5

(35)

Question 17

At the end of their final exam,550 students answered an additional question in which they rated their instructor's teaching effectiveness,with the following results. $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\text { Student's Rating of Instructor }$ Student's Final Grade Very or Somewhat Effective Very or Somewhat Ineffective A 190 85 B 75 120 C 20 17 D 9 18 F 1 15 What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

(Multiple Choice)

4.8/5

(28)

Question 18

The percentage of measurements in a class is called the ___________ of that class.

(Multiple Choice)

4.9/5

(20)

Question 19

A ______________ can be used to differentiate the "vital few" causes of quality problems from the "trivial many" causes of quality problems.

(Multiple Choice)

4.7/5

(40)

Question 20

Using the following data,describe the shape of the data distribution. 1. 11.5 6. 13.7 11. 11.0 16. 14.5 2. 13.5 7. 14.0 12. 13.0 17. 15.5 3. 12.5 8. 12.0 13. 16.7 18. 13.0 4. 15.2 9. 12.7 14. 12.5 19. 18.2 5. 14.7 10. 12.5 15. 11.5 20. 11.7

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 Construct a stem-and-leaf plot.

Splitting the stems refers to assigning the same stem to two or more rows of the stem-and-leaf display.

A Stem-and-leaf display is best used to ___________.

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months.Construct a dot plot of these data and describe the distribution. 5,1,4,8,0,6,3,5,3,4,7,15,5,8,2,1,5,4

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 Construct a frequency polygon.

Which of the following graphical tools is not used to study the shapes of distributions?

Using the following data,what would be the leaf unit in a stem-and-leaf display? 1. 11.5 6. 13.7 11. 11 16. 14.5 2. 13.5 7. 14 12. 13 17. 15.5 3. 12.5 8. 12 13. 16.7 18. 13 4. 15.2 9. 12.7 14. 12.5 19. 18.2 5. 14.7 10. 12.5 15. 11.5 20. 11.7

A ______________ shows the relationship between two variables.

In the first step of setting up a Pareto chart,a frequency table should be constructed of the defects (or categories)in decreasing order of frequency.

When establishing the classes for a frequency table,it is generally agreed that the more classes you use the better your frequency table will be.

Fill in the missing components of the following frequency distribution constructed for a sample size of 50.

A local electronics retailer recently conducted a study on purchasers of large screen televisions.The study recorded the type of television and the credit account balance of the customer at the time of purchase.They obtained the following results.

A(n)______ is a graph of a cumulative distribution.

A bar chart is a graphic that can be used to depict qualitative data.

If there are 62 values in a data set,how many classes should be created for a frequency histogram?

The percentage of measurements in a class is called the ___________ of that class.

A ______________ can be used to differentiate the "vital few" causes of quality problems from the "trivial many" causes of quality problems.

An Introduction to Business Statistics

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Comparing Two Means and Two Proportions

Filters