Exam Prep Ch.3 Creating & Reading Graphics

Chapter 3

Test Bank

Type: true-false

Title: Chapter 03 Question 01

1. True or False: The y-axis was more formally known as the abscissa.

Feedback: Page reference: E, p5

a) True

b) False

Type: true-false

Title: Chapter 03 Question 02

2. True or False: Histograms and Bar Charts are similar in that they plot frequencies on the y-axis and possible observations on the x-axis.

Feedback: Page reference: E, p5

a) True

b) False

Type: true-false

Title: Chapter 03 Question 03

3. True or False: Pie charts are most useful when presenting categorical data and relative frequencies.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 04

4. True or false: Scatterplots are usually used to graph the relationship between two variables.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 05

5. True or False: Graphs are the best and necessary method for presenting data.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 06

6. True or False: When plotting a graph, the axes should always be labeled.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 07

7. True or False: It is possible for the reader of statistics to over interpret what is being stated on a graph.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 08

8. True or False: When a graph is used, it can always be assumed that it is the best and correct way to visualize data.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 09

9. True or false: When plotting a bar chart, the bars in the graph are not supposed to touch

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 10

10. True or False: Bar charts are for discrete data and histograms are for continuous data

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 11

11. True or False: When using a stem-and-leaf plot, it is still possible to identify all the datapoints in a dataset.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 12

12. True or False: graphs are always necessary for presenting data.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 13

13. True or False: When you have continuous data, there can be an infinite number of points between two adjacent data values

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 14

14. True or False: Frequency polygons are like histograms, except used for discrete data.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 15

15. True or False: For the number 62, a stem-and-leaf-plot would plot 6 as the stem and 2 as the leaf.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 16

16. True or False: If you are interested in plotting the means of two experimental groups, it is best to use a histogram

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 17

17. True or False: One reason why scientists didn’t always trust the data was because graphs don’t show raw data

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 18

18. True or False: The y-axis is called the ordinate

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 19

19. True or False: Only raw data can be plotted. Means cannot be plotted.

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a) True

b) False

Type: true-false

Title: Chapter 03 Question 20

20. True or False: In a time-series graph, time is plotted along the ordinate

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a) True

b) False

Type: multiple choice question

Title: Chapter 03 Question 01

1. The horizontal axis is also known as the _______________; the vertical is also known as the _________________.

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a. X-axis; longitudinate

b. ordinate; y-axis

c. abscissa; ordinate

d. ordinate; abscissa

Type: multiple choice question

Title: Chapter 03 Question 02

2. Which of the following the best description of discrete data?

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a. Discrete data are on ratio scales

b. Discrete data are generally on nominal and ordinal scale

c. Discrete data are best presented in histograms

d. Discrete data should not be graphed.

Type: multiple choice question

Title: Chapter 03 Question 03

3. In a stem-and-leaf plot, which of the following is true?

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a. It is more like a table: you can extract every data point from the dataset

b. Generally, if you have values like 10 and 20, 1 and 2 would be the stems, and 0 would be the leaves.

c. They are useful because they group data without losing information

d. All of the above

Type: multiple choice question

Title: Chapter 03 Question 04

4. Histograms show ___________ on the ordinate and ________ on the abscissa

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a. frequencies; groups

b. frequencies; observations

c. observations; frequencies

d. observations; groups

Type: multiple choice question

Title: Chapter 03 Question 05

5. A frequency polygon is best used when data are ________________ while a bar chart is best used when the data are __________________.

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a. On an ordinal scale; on a nominal scale

b. continuous; discrete

c. categorical; continuous

d.discrete; on an ordinal scale.

Type: multiple choice question

Title: Chapter 03 Question 06

6. A researcher is interested in the number of hours football players spend practicing during the season. He wants to plot the data showing the number of players who practice at various amounts of hours. Which of the following is the best way to plot this data?

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a. histograms and frequency polygons

b. Pie charts

c. Bar charts

d. Any of the above will work equally effectively.

Type: multiple choice question

Title: Chapter 03 Question 07

7. If you have a dataset plotting relative frequencies of individuals’’ favorite color, which of the following is most appropriate?

Feedback: Page reference: p12

a. bar charts

b. histograms and frequency polygons

c. pie charts

d. scatter plots

Type: multiple choice question

Title: Chapter 03 Question 08

8. When you want to portray the relationship between two continuous variables, it is best to use a…

Feedback: Page reference: p17

a. Scatterplot

b. Bar chart

c. Time-series plot

d. All of the above are valid methods.

Type: multiple choice question

Title: Chapter 03 Question 09

9. A researcher examining whether taller parents also have taller children. Which of the following would be a good way to plot her data?

Feedback: Page reference: p17

a. a pie chart

b. a stem-and-leaf graph

c. a time-series plot

d. a scatterplot

Type: multiple choice question

Title: Chapter 03 Question 10

10. A university is interested in their students’ eating habits. They sampled students and asked the number of meals they usually skip in a given a week.

If you want to plot the percentage students in each category, you should use a …

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a. Bar chart

b. Pie chart

c. Scatterplot

d. None of the above are appropriate.

Type: multiple choice question

Title: Chapter 03 Question 11

11. A university is interested in their students’ eating habits. They sampled students and asked the number of meals they usually skip in a given a week.

In this sample, the best way to plot the data in its current form is using a …

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a. Bar chart

b. Pie chart

c. Scatterplot

d. Frequency polygon

Type: multiple choice question

Title: Chapter 03 Question 12

12. A university is interested in their students’ eating habits. They sampled students and asked the number of meals they usually skip in a given a week.

Which of the following types of graphs is least effective for this data?

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a. histogram

b. frequency polygon

c. stem and leaf graph

d. all of the above are actually effective and equally useful for this data

Type: multiple choice question

Title: Chapter 03 Question 13

13. In a frequency polygon, each point on the graph represents the _____________ of a(n)___________.

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a. relative proportion; observation

b. frequency; observation

c. observation; individual

d. None of the above.

Type: multiple choice question

Title: Chapter 03 Question 14

14. A research wants to compare the means of three groups in his experiment. Which of the following is the most effect method of doing so?

Feedback: Page reference: p7

a. frequency polygon

b. stem-and-leaf graph

c. bar chart

d. scatterplot

Type: multiple choice question

Title: Chapter 03 Question 15

15. Which of the following is not good practice when plotting graphs?

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a. x and y axes intersect at 0

b. x and y axes are clearly labeled

c. creating as many graphs as possible

d. having a title to your graph

Type: multiple choice question

Title: Chapter 03 Question 16

16. The K.I.S.S. rule suggests that graphs should be…

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a. simple

b. clear

c. short

d. All of the above

Type: multiple choice question

Title: Chapter 03 Question 17

17. A manager wants to track his employees’ productivity throughout the work day to see when his team needs the most support to increase output. He collects his data that shows the amount of output his workers are producing every hour. How can he visualize the data?

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a. stem-and-leaf plot

b. time-series plot

c. pie chart

d. frequency polygon

Type: multiple choice question

Title: Chapter 03 Question 18

18. Which of the following is most similar to a frequency polygon, with regards to the type of data that it plots and the way it is interpreted?

Feedback: Page reference: p12

a. bar chart

b. pie chart

c. stem-and-leaf graph

d. histogram

Type: multiple choice question

Title: Chapter 03 Question 19

19. Who invented the stem-and-leaf graph?

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a. Galton

b. Newton

c. Pearson

d. Tukey

Type: multiple choice question

Title: Chapter 03 Question 20

20. Scatterplots were created by

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a. Darwin

b. Galton

c. Tukey

d. Pearson

Type: multiple choice question

Title: Chapter 03 Question 21

21. In a scatterplot, the y-axis is used to label…

Feedback: Page reference: p17, 18

a. Frequency of a variable

b. observations of a variable

c. relative frequency of a variable

d. any of the above

Type: multiple choice question

Title: Chapter 03 Question 22

22. Consider a data with two outcomes: yes and no. The best way to plot this data is…

Feedback: Page reference: p6

a. Bar chart

b. Pie chart

c. Histogram

d. Stem-and-leaf graph

Type: multiple choice question

Title: Chapter 03 Question 23

23. Which of the following is not the right way to use a graph?

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a. Time-series graphs usually have time on the x-axis

b. Pie charts are used to relative frequencies

c. Frequency polygons should be used just like bar charts

d. Histograms should have bars that are touching each other

Type: multiple choice question

Title: Chapter 03 Question 24

24. Which would be the correct way to split the number 237 in a stem-and-leaf graph?

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a. 2 would be the stem, and 37 as the leaf.

b. 23 as the stem, and 7 as the leaf.

c. 237 is the stem, there is no leaf.

d. There is no stem, and 237 are all leaf.

Type: multiple choice question

Title: Chapter 03 Question 25

25. Each point on scatterplot represents…

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a. one observation from one variable for one individual

b. two observations from two variables for the same individual

c. the mean

d. two observations from two variables for two individuals

Type: essay/short answer question

Title: Chapter 03 Question 01

1. For each scenario, identify the best type of visualization for the data

Having two groups: Experimental and Placebo in a drug trial. A researcher wants to plot mean differences in the number of days it took for the patient to recover.

Type: essay/short answer question

Title: Chapter 03 Question 02

2. For each scenario, identify the best type of visualization for the data

Having the relative frequencies of the individuals’ choice for car brands

Type: essay/short answer question

Title: Chapter 03 Question 03

3. For each scenario, identify the best type of visualization for the data

A research wants to plot the relationship between income and the number of years of education in a sample of employed workers.

Type: essay/short answer question

Title: Chapter 03 Question 04

4. Identify three good practices involving the use of graphs

Type: essay/short answer question

Title: Chapter 03 Question 05

5. Explain the difference between a frequency histogram and a bar chart. What data are they each best used for and give an example of how they are used.

Type: essay/short answer question

Title: Chapter 03 Question 06

6. Use the following stem and leaf-plot to answer the next few questions. The data plots the temperature of the day when there were earthquakes in the last 5 years.

Type: essay/short answer question

Title: Chapter 03 Question 07

7. Use the following stem and leaf-plot to answer the next few questions. The data plots the temperature of the day when there were earthquakes in the last 5 years.

How many observations were there?

Type: essay/short answer question

Title: Chapter 03 Question 08

8. Use the following stem and leaf-plot to answer the next few questions. The data plots the temperature of the day when there were earthquakes in the last 5 years.

how many earthquakes occurred between 70 and 80 degrees?

Type: essay/short answer question

Title: Chapter 03 Question 09

9. Use the following stem and leaf-plot to answer the next few questions. The data plots the temperature of the day when there were earthquakes in the last 5 years.

Identify one other way to graph this data

Type: essay/short answer question

Title: Chapter 03 Question 10

10. Explain why graphs sometimes need to be interpreted with caution

Type: essay/short answer question

Title: Chapter 03 Question 11

11. Below are some data about whether a sample of individuals knows how to ride a bicycle

Is this data continuous or discrete?

Type: essay/short answer question

Title: Chapter 03 Question 12

12. Below are some data about whether a sample of individuals knows how to ride a bicycle

What type of chart did you construct for the question above?

Type: essay/short answer question

Title: Chapter 03 Question 13

13. Below are some data about whether a sample of individuals knows how to ride a bicycle

What percentage of the participants knows how to ride a bicycle?

Type: essay/short answer question

Title: Chapter 03 Question 14

14. Below are some data about whether a sample of individuals knows how to ride a bicycle

How many participants do not know how to ride a bicycle?

Type: essay/short answer question

Title: Chapter 03 Question 15

15. Below are some data about whether a sample of individuals knows how to ride a bicycle

The frequencies of the data would be represented by which axis?

Type: essay/short answer question

Title: Chapter 03 Question 20

20. Using the data below about how many airline miles each participant accrued over the span of the year

Would a bar chart or a frequency histogram is best for visualizing this data?

Type: essay/short answer question

Title: Chapter 03 Question 21

21. Using the data below about how many airline miles each participant accrued over the span of the year

Is this a type of data discrete or continuous?

Type: essay/short answer question

Title: Chapter 03 Question 22

22. Using the data below about how many airline miles each participant accrued over the span of the year

How may people in this data set flew 70,000 or more miles in the last year?

Type: essay/short answer question

Title: Chapter 03 Question 23

23. Using the data below about how many airline miles each participant accrued over the span of the year

how many people in this data set flew between 20000 and 59999 miles in the last year?

Type: essay/short answer question

Title: Chapter 03 Question 24

24. Using the data below about how many airline miles each participant accrued over the span of the year

In this type of data visualization, frequencies are plotted on which axis?

Type: essay/short answer question

Title: Chapter 03 Question 29

29.

Approximately how many individuals have GPAs 3.8 or higher?

Type: essay/short answer question

Title: Chapter 03 Question 30

30.

Is this data continuous or discrete?

Type: essay/short answer question

Title: Chapter 03 Question 33

33. A customer service center is interested in how many calls they get during different times of the day. They record the number of calls they receive ever two hours (time here is presented in military time).

At which hour did the call center receive the fewest calls? At which hour did they receive the most? (E)

Type: essay/short answer question

Title: Chapter 03 Question 34

34. A customer service center is interested in how many calls they get during different times of the day. They record the number of calls they receive ever two hours (time here is presented in military time).

Would this data be best described as a unimodal or bimodal distribution? (E)