NAME DATE PERIOD Lesson 1 Homework Practice - Weebly

[Pages:6]NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 1 Homework Practice

Scatter Plots

Games Won Car Value (% cost new)

Pumpkin Weight (pounds)

Interpret each scatter plot.

1.

y

2.

10

8

6

4

2 x

0 100 200 300 400 500 Average Game Attendance

100 y

3.

90

80

70

60

50

40

30

20

10 x

0 2 4 6 8 10

Car Age (yr)

50 y 40

30

20

10 x

0 30 60 90 120150 Growth Time (days)

4. RIVER Construct a scatter plot of the river's width and the water's speed.

River Width (m)

15 18 20 28 30 32 38 40 42 45

Water Speed (km/h) 12.6 10.7 11.2 9.7 8.1 8.7 6.9 5.4 3.9 4.1

Copyright ? The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.

5. DONATIONS Construct a scatter plot of the number of cars donated to a local charity over the past five years since 2007. Years Since 2007 1 2 3 4 5 Number of Cars 14 21 30 28 35

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NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 2 Homework Practice

Lines of Best Fit

1. BALLOONS Salina is having a surprise party for her friend Ernie. The table shows how many balloons she has been able to blow up by the end of each 10-minute segment.

Time (min) 10 20 30 40 50 Balloons 3 12 15 16 21

a. Construct a scatter plot of the data. Then draw and assess a line that seems to best represent the data.

b. Use the line of best fit to make a conjecture about the number of balloons she will have blown up at the end of 70 minutes.

Number of Balloons

y 34 32 28 24 20 16 12

8 4

x 0 10 20 30 40 50 60 70 80 90

Time (min)

2. COMIC BOOKS Sidney is selling his comic book collection on the Internet. The scatter plot shows how many comic books he has left at the end of each day.

a. Write an equation in slope-intercept form for the line that is drawn.

b. Use the equation to make a conjecture about the number of comic books he will have at the end of the seventh day.

Comic Books Left

y 90 80 70 60 50 40 30 20 10

x 0 123456789

Days

3. ICE RINK Maury has an ice rink in his back yard. The scatter plot shows the thickness of the ice relative to the temperature.

a. Write an equation in slope-intercept form for the line that is drawn.

b. Use the equation to make a conjecture about the -13 inches.

Temperature (?F)

0

-1 -2 -3 -4 -5 -6 -7 -8 -9 y

Ice Thickness (in.)

1

2

3

x

Copyright ? The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.

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NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 3 Homework Practice

Two-Way Tables

For Exercises 1-6, use the Venn diagram at the right and the information below.

The Venn diagram compares the roller coasters at an amusement park as to whether or not they are made of steel and whether or not they have loops.

Steel

Loops

2

6

4

2

Copyright ? The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.

1. Complete the two-way table below.

Loops No Loops

Total

Steel

Not Steel

Total

2. How many roller coasters are at the amusement park?

3. Find the relative frequencies from the 4. Interpret the relative frequencies you

table in Exercise 1 by row.

found in Exercise 3.

Loops

Steel Not Steel -160- = 0.60

Total

No Loops

5. Find the relative frequencies from the 6. Interpret the relative frequencies you table in Exercise 1 by column. Round to found in Exercise 5. the nearest hundredth if necessary.

Loops

Steel Not Steel -68 = 0.75

No Loops

Total

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NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 4 Homework Practice

Descriptive Statistics

For Exercises 1 and 2, find the mean, median, mode, and range of each data set. Round to the nearest tenth if necessary.

1. The ages, in years, of the students in an art class: 23, 21, 19, 23, 24, 17, 15

2. The number of text messages sent in a week: 39, 41, 30, 14, 45, 40, 48, 39, 40, 35

For Exercises 3 and 4, find the five-number summary of each set of data. Draw a box plot of the data.

3. The ages, in years, of the residents of a retirement community are shown in the table.

Ages in Years

86 83 98 99 81 86 95 84 79 90

4. The weekly amounts, in dollars, in a bank account are 169, 163, 153, 166, 149, 148, 146, 145, 152, 163, and 152.

5. What is a conclusion that can be drawn from the box plot for Exercise 4?

Copyright ? The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.

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NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 5 Homework Practice

Measures of Variation

For Exercises 1 and 2, find the mean absolute deviation of each set of data. Round to the nearest tenth if necessary. Describe what the mean absolute deviation represents.

1. Exercise Time (min)

45 60 75 90 100 75 90 105

2. Food Items Donated

38

46

52

44

47

55

3. Refer to the table in Exercise 1. The standard deviation is about 20.4 minutes. Describe the data values that are within one standard deviation of the mean.

Copyright ? The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.

4. The table shows the selling prices of various laptops at two electronic stores. a. Find the mean absolute deviation for each set of data. Round to the nearest hundredth.

b. Write a sentence comparing their variation.

Tablet Prices ($)

Crazy for Computers

Keyboard Kings

150

500

200

550

500

650

800

850

1,000

900

1,200

1,100

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Attendance (thousands)

NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 6 Homework Practice

Analyze Data Distributions

1. CARNIVALS The number of people that attended the carnival each year is shown in the graph at the right. a. Describe the shape of the distribution. Identify any clusters, gaps, peaks, or outliers.

b. Describe the center and spread of the distribution. Justify your response based on the shape of the distribution.

Carnival Attendance

40

30

27 29

20 13 16 10

0 2010 2011 2012 2013

Year

2. APPLES Mr. Kelly's homeroom went apple picking. The line plot shows the number of pounds of apples that were collected. a. Describe the shape of the distribution. Identify any clusters, gaps, peaks, or outliers.

Number of Pounds of Apples Picked

? ?? ? ? ?? ??

17 18 19 20 21 22 23 24

b. Describe the center and spread of the distribution. Justify your response based on the shape of the distribution.

3. TEMPERATURE The line plot shows the high temperatures for various days through the summer. a. Describe the shape of the distribution. Identify any clusters, gaps, peaks, or outliers.

High Temperatures

?

? ??

?

? ? ?

? ??

97 98 99 100 101 102

b. Describe the center and spread of the distribution. Justify your response based on the shape of the distribution.

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