Name: ______________________________

Date: March 27, 2017

Homeroom:

7th Grade Math:

Unit: Statistics and Probability

Packet 110: Comparing Populations

Objectives: Scholars will be able to compare two populations by their center, shape

and spread. Agenda:

1. Review Do Now 6. Exit Ticket2. Center, Shape and Spread 7. Homework Overview3. Comparing Box and Whisker Plots4. Comparing Dot Plots5. Independent Practice Homework 110: Comparing

PopulationsDo Now:1.) The box-and-whisker plot below displays the number of visitors (in millions) to the

state parks in each of the 50 states in 2000.

Part A Find the following: 1.) lower extreme _______ 2.) lower quartile _______

3.) upper extreme _______ 4.) upper quartile _______

5.) range _______ 6.) median _______

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Part B Approximately what percentage of states had fewer than 18.2 million visitors to their state park?

Center, Shape and SpreadWhen comparing two populations, we look for and compare the center, shape and spread of each one-then draw conclusions, or inferences.

Center Shape Spread

Comparing Box and Whisker PlotsLook at the two box-and-whisker plots below. What conclusions can you draw?

Center Shape Spread

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Comparing Dot PlotsLook at the two dot plots below. What conclusions can you draw?

Center Shape Spread

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Independent Practice1. The double box and whisker plot shows the number of points scored by

the football team for two seasons. Compare the centers and variations of the two populations. During which season was the team’s performance more consistent?

Center Shape Spread

Conclusion:

2. The line plots below show the weights for house cats and small dogs. Compare the centers and variations of the two populations. Which animal has the more consistent weight?

Center Shape Spread

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Center Shape Spread

3. Compare the centers and variations of the two populations in each exercise. Write an inference you can draw from the graphs.

Center Shape Spread

Conclusion:

Center Shape Spread

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Conclusion:

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Directions: Answer the following questions. Show all of your work and circle your final answer.

1. The double box plot shows the average monthly high temperatures for Phoenix, Arizona, and Las Vegas, Nevada. Compare the centers and variations of the two populations and write an inference you can draw from the graphs.

Center Shape Spread

Conclusion:

2. The double dot plot shows the number of city pet registrations for several days.

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Name: ______________________________

Date: March 27, 2017

Homeroom:

Mrs. Petrozzi: (614) 725-9693

7th Grade Math:

Unit: Statistics and Probability

Packet 110: Comparing Populations

Redo: Score: ________/5 _________% DNG A B C D F

Compare the centers and variations of the two populations and write an inference you can draw from the graphs.

Center Shape Spread

Conclusion:

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Name: ______________________________

Date: March 27, 2017

Homeroom:

7th Grade Math:

Unit: Statistics and Probability

Packet 110: Comparing Populations

Directions: Answer the following questions. Circle your final answers. When you finish the exit ticket, place it face down on your desk and assign yourself to your advanced work or an independent reading book.

1. Alexis chose a random sample of 10 jars of almonds from each of two different brands, X and Y. Each jar in the sample was the same size. She counted the number of almonds in each jar. Her results are shown in the plots.

Based on the plots, which statement best compares the number of almonds in the jars from the two brands?

A.The number of almonds in jars from Brand X tends to be greater and more consistent than those from Brand Y.

B.The number of almonds in jars from Brand X tend to be greater and less consistent than those from Brand Y.

C.The number of almonds in jars from Brand X tends to be fewer and more consistent than those from Brand Y.

D.The number of almonds in jars from Brand X tends to be fewer and less consistent than those from Brand Y.

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