8 th Grade – Domain 4: Statistics and Probability (12%) MGSE8.SP.1 1. As the age of a car increases, its value decreases. Which scatterplot best represents this relationship? A. Plot A B. Plot B C. Plot C D. Plot D A. C. B. D. MGSE8.SP.1 2. The scatterplot on the right shows data for groups R and S. Which of the following statements is true about the correlation between the x and y values of group R and the correlation between the x and y values of group S? A. The x and y values appear to be negatively correlated in both R and S. B. The x and y values appear to be positively correlated in both R and S. C. The x and y values appear to be negatively correlated in R but positively correlated in S. D. The x and y values appear to be positively correlated in R but negatively correlated in S.
Transcript
8th Grade – Domain 4: Statistics and Probability (12%)
MGSE8.SP.11. As the age of a car increases, its value decreases.
Which scatterplot best represents this relationship?
A. Plot AB. Plot BC. Plot CD. Plot D
A. C.
B. D.
MGSE8.SP.12. The scatterplot on the right shows data for groups
R and S. Which of the following statements is true about the correlation between the x and y values of group R and the correlation between the x and y values of group S?
A. The x and y values appear to be negatively correlated in both R and S.
B. The x and y values appear to be positively correlated in both R and S.
C. The x and y values appear to be negatively correlated in R but positively correlated in S.
D. The x and y values appear to be positively correlated in R but negatively correlated in S.
MGSE8.SP.13. The table on the right shows the average and
maximum longevity of various animals in captivity.
A. Draw a scatter plot for the data in the table above.
B. Determine what relationship exists in the
Longevity (Years)
Avg. 12 25 15 8 35 40 41 20
Max. 47 50 40 20 70 77 61 54
data.
Positive Correlation, Negative Correlation, or No Correlation
C. Complete the statement:
As the average ___________________,
The maximum ___________________.
MGSE8.SP.24. Mary collected data each day on how many
commercials she saw and how long she watched TV. She displayed her data in a scatter plot.
According to the trend line shown in in the Scatter plot, about how many commercials will
Mary see if she watches TV for 112 hours?
A. 19B. 27C. 39D. 90
MGSE8.SP.25. An airport terminal runs shuttle buses to different
parts of the airport. The scatter plot shows the times for each part of the airport and a number of round trips.
Which equation is closest to the line of best fit for the data?
A. y=35x+1
B. y=32x+1
C. y=34x+2
D. y=54x+2
MGSE8.SP.26. Write the equation of the line of best fit for the
scatter plot below.
A. y=−34x+9
B. y=−x+9
C. y=−12x+9
D. y=−54x+9
MGSE8.SP.37. Which equation best fits the data shown in the
scatter plot on the right?
A. y= 14x−1
B. y=12x−12
C. y=34x−2
D. y=x−3
MGSE8.SP.38. On the right is a graph created for a dirt bike
salesman after test riding several bikes. What is the slope of the line of best fit?
A. 6 miles per hour
B. 12 miles per hour
C.16 miles per hour
D. 3 miles per hour MGSE8.SP.39. A researcher studied the eyesight of people at
different ages. She calculated a vision score for each person in the study and plotted the data on the graph below.
The researcher used the line y=−0.1x+110 to model the data. When she substituted the value x = 65 into this equation, what did the result tell her?
A. The exact value for the vision of a 65 year old
B. The predicted value for the vision score of a 65 year-old
C. The minimum possible value for the vision score of a 65 year-old
D. The maximum possible value for the vision score of a 65 year-old
MGSE8.SP.410. The table on the right shows the game system
that eighty 8th graders chose to be their favorite:
Of the eighty 8th graders surveyed, what percentage is girls who prefer Wii?
A. 22.5% B. 25% C. 32.5% D. 50%
MGSE8.SP.4
11. A large group of people was surveyed about their favorite movie genre. The participants had to give their age and choose their favorite genre from Action, Comedy, and Horror.
What percentage of 25-49 year olds like Action Movies?
A. 32B. 35C. 45D. 47
Ages Action Comedy Horror Total18-25years old
238 450 312 1,000
25-49years old
350 472 178 1,000
50 +years old
320 490 190 1,000
Total 908 1,412 680 3,000
MGSE8.SP.412. What’s the difference between the number of
50 + year olds who prefer comedy and the number of 18-25 year olds who prefer horror?
