����app

The dotplot below shows the number of books read in a month by students in a college class. Find the most and least frequent number of books read.

Compare the two dotplots, which give the number of siblings students have in Class A and Class B. Which class has more students with 2 siblings?

Graphing Data Sets In Exercises 17–32, organize the data using the indicated type of graph. Describe any patterns.

Life Spans of Houseflies Use a dot plot to display the data, which represent the life spans (in days) of 30 houseflies. 

9 9 4 11 10 5 13 9 7 11 6 8 14 10 6 

10 10 7 14 11 7 8 6 13 10 14 14 8 13 10

Phone Screen Sizes Display the data below in a dot plot. Describe the differences in how the stem-and-leaf plot and the dot plot show patterns in the data.

In Exercises 7 and 8, use the data set shown in the table at the left, which represents the pollution indices (a unitless measure of pollution ranging from 0 to 100) for 24 U.S. cities. (Adapted from Numbeo)

Use a dot plot to display the data set. Describe any patterns.

The heights (in feet) and the number of stories of the ten tallest buildings in New York City are listed. Use a scatter plot to display the data. Describe any patterns. (Source: Emporis)

The data set represents the number of minutes a sample of 27 people exercise each week.

108 139 120 123 120 132 123 131 131

157 150 124 111 101 135 119 116 117

127 128 139 119 118 114 127 142 130

g. Display the data using a box-and-whisker plot.

Putting Graphs in Context In Exercises 5–8, match the plot with the description of the sample.

a. Times (in minutes) it takes a sample of employees to drive to work

b. Grade point averages of a sample of students with finance majors

c. Top speeds (in miles per hour) of a sample of high-performance sports cars

d. Ages (in years) of a sample of residents of a retirement home

" style="" width="385">

Graphical Analysis In Exercises 9–12, use the stem-and-leaf plot or dot plot to list the actual data entries. What is the maximum data entry? What is the minimum data entry?

" style="" width="385">

Using Technology to Find Quartiles and Draw Graphs In Exercises 23–26, use technology to draw a box-and-whisker plot that represents the data set.

Vacation Days The number of vacation days used by a sample of 20 employees in a recent year

3 9 2 1 7 5 3 2 2 6

4 0 10 0 3 5 7 8 6 5

Using Technology to Find Quartiles and Draw Graphs In Exercises 23–26, use technology to draw a box-and-whisker plot that represents the data set.

Hourly Earnings The hourly earnings (in dollars) of a sample of 21 employees at a consulting firm

25.89 27.09 31.76 28.28 26.19 27.43 24.06

25.61 22.56 29.76 18.01 23.66 38.24 37.27

32.70 31.12 25.87 15.06 23.12 30.62 19.85

Studying Refer to the data set in Exercise 23 and the box-and-whisker plot you drew that represents the data set.

c. You randomly select one student from the sample. What is the likelihood that the student studied less than 2 hours per day? Write your answer as a percent.

Hourly Earnings Refer to the data set in Exercise 26 and the box-and-whisker plot you drew that represents the data set.

b. What percent of the employees made more than $23.39 per hour?