Mad and Scatterplot Review

Describe the Association for the graph.

• Linear and Negative

• Linear and Positive

• Non-Linear and No Association

• Non-Linear and Positive

• Non-Linear and Negative

Tags

CCSS.8.F.A.3

Describe the association for the graph.

• Linear and Positive

• Linear and Negative

• Non-Linear and Positive

• Non-Linear and Negative

• Non-Linear and No Association

Tags

CCSS.8.F.A.3

Phil collected data from several of his friends about the number of hours they spent sleeping and the number of hours they spent playing video games on Saturday. He recorded the data in the scatterplot. Based on the scatterplot, what is the best prediction of the number of hours one of Phil's friends spends sleeping when the friend spends 1 hour playing video games?

• 9 hours

• 10 hours

• 7 hours

• 8 hours

Ben collected data from a group of 12 people. He measured each person's resting heart rate and recorded the average number of hours each person exercised per week. He created a scatterplot to show the data he collected. Based on the scatterplot, what is the best prediction of the resting heart rate, in beats per minute, of a person who exercises an average of 8 hours per week?

• 30 beats per minute

• 50 beats per minute

• 55 beats per minute

• 60 beats per minute

The manager of a restaurant recorded how many people were in different groups of customers and how much those groups spent on food and beverages. The scatterplot below shows the data she recorded. Based on this scatterplot, about how much money would a group of 10 people be expected to spend on food and beverages at this restaurant?

• $135

• $115

• $105

• $150

Julie made 25 international long-distance phone calls to London last month. The scatterplot below shows the length and cost of each phone call she made. Which conclusion is best supported by the scatterplot?

• As the length of a call increases, the cost of the call increases.

• As the length of a call increases, the cost of the call remains the same.

• As the length of a call increases, the cost of the call descreases.

• There is no relationship between the length of a call and the cost of a call.

Students recorded the total number of pages and chapters in each of several books on the scatterplot. Based on the scatterplot, which is the best prediction of the total number of pages in a book with 4 chapters?

• 150 pages

• 140 pages

• 90 pages

• 120 pages

Find the MAD:
2,4,6,8,10,12

• 5

• 7

• 1

• 3

Find the Mean Absolute Deviation:  10, 9, 3, 8, 10.  The Mean is 8

• 3

• 5

• 1

• 2

Determine the mean absolute deviation of the data. 9, 7, 11, 10, and 8

• 9

• 6

• 1.2

• 5