Question 1

Which of the following best describes the distribution shown in the top left histogram of the first image?

Accepted Answer

Uniform (symmetric)

Question 2

In the 'Hours Worked per Week Frequency Polygon' (second image), what is the class midpoint for the interval 29.5 to 49.5?

Accepted Answer

$$\frac{29.5 + 49.5}{2} = 39.5$$

Question 3

Which type of graph is most appropriate for displaying the cumulative frequency of a quantitative variable, as shown in the third image?

Accepted Answer

Ogive

Question 4

Refer to the 'Birth rates by selected age of mother' time-series plot (fourth and fifth images). What is the main advantage of using a time-series plot for this data?

Accepted Answer

It reveals trends and changes in birth rates over time for different age groups.

Question 5

In the 'Burglaries in Minneapolis' bar graph (sixth image), what could make this graph misleading?

Accepted Answer

The scale does not start at zero, exaggerating the difference between categories.

Question 6

Which of the following is a key feature of a histogram that distinguishes it from a bar graph?

Accepted Answer

Bars touch each other to indicate continuous data.

Question 7

If a dataset is described as 'skewed right,' which histogram from the first image best represents this distribution?

Accepted Answer

Bottom left (c)

Question 8

What is the cumulative frequency for the class '0 to 39 hours' in the ogive shown in the third image?

Accepted Answer

Approximately 288

Question 9

Which of the following is NOT a reason a graph might be misleading?

Accepted Answer

Using a time-series plot for time-based data.

Question 10

In the 'How We Flush a Public Toilet' graphic (eighth image), what is a potential issue with the visual representation?

Accepted Answer

The size of the toilet paper rolls exaggerates the differences between categories.

Question 11

Which of the following best describes the distribution in the bottom right histogram of the first image?

Accepted Answer

Skewed left

Question 12

What is the main purpose of a frequency polygon, as shown in the second image?

Accepted Answer

To compare the frequencies of classes using connected points

Question 13

In the 'Number in Poverty' bar graph (seventh image), what type of data is being displayed?

Accepted Answer

Quantitative, time-series data

Question 14

Which of the following is true about pie charts?

Accepted Answer

They show the proportion of each category as a sector of a circle.

Question 15

If you want to compare the educational attainment of males and females using relative frequencies, which type of graph should you use?

Accepted Answer

Side-by-side bar graph

Organizing and Summarizing Data: Essential Graphical and Tabular Methods in Introductory Statistics

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