AnswersEF Math 12 1st Nine WeeksOrganizing Data

Organizing Data Answers

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The scatter plot shows the study time and test scores for the students in Mrs. Johnson’s English Literature class. Based on the results, which of the following is an appropriate score for a student who studies for 1 hour?

Question illustration
A
68
B
98
C
82
D
72
2
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The following is a scatter plot of the heights and weights of the students in Mr. Baldwin’s PE class. What is the weight of the student who is 75 inches tall? Does the scatter plot show a positive or negative correlation?

Question illustration
A
About 191 pounds; negative correlation
B
About 191 pounds; positive correlation
C
About 185 pounds; negative correlation
D
About 185 pounds; positive correlation
3

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. People Entering Amusement Park Time (minutes)

Question illustration
A
positive; as time passes, the number of people entering decreases.
B
negative; as time passes, the number of people entering decreases.
C
no correlation
D
positive; as time passes, the number of people entering increases.
4

Eight people of various ages were polled and asked to estimate the number of CDs they had bought in the previous year. The following table contains the collected data. The variable x represents the age. The variable y represents the number of CDs.. Age Number of CDs 18 12 20 17 24 10 25 6 28 4 30 4 32 2 34 3 Using the data in the table, choose which set of axes and which set of ordered pairs should be used in making a scatter plot of the data. Graph A Graph B Set A (18, 12), (20, 17), (24, 10), (25, 6), (28, 4), (30, 4), (32, 2), (34, 3) Set B (12, 18), (17, 20), (10, 24), (6, 25), (4, 28), (4, 30), (2, 32), (3, 34)

Question illustration
A
Graph A, Set A
B
Graph A, Set B
C
Graph B, Set A
D
Graph B, Set B
5

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. Sport Utility Vehicle Sales in the U.S., 1991-2001 Year Source: The World Almanac, 2003

Question illustration
A
negative correlation; as time passes, SUV sales decrease.
B
no correlation
C
positive correlation; as time passes, the SUV sales decrease.
D
positive correlation; as time passes, the SUV sales increase.
6

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. Domestic Traveler Spending in the U.S., 1987-1999 Year Source: The World Almanac, 2003

Question illustration
A
positive correlation; as time passes, spending increases.
B
no correlation
C
positive correlation; as time passes, spending decreases.
D
negative correlation; as time passes, spending decreases.
7

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. Video Rental Fines

Question illustration
A
negative; as the number of videos rented increases, the amount of fine increases.
B
negative; as the number of videos rented increases, the amount of fine decreases.
C
no correlation
D
positive; as the number of videos rented increases, the amount of fine decreases.
8

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. United States Birth Rate (per 1000) Year Source: National Center for Health Statistics, U.S. Dept. of Health and Human Services

Question illustration
A
no correlation
B
positive correlation; as time passes, the birth rate increases.
C
positive correlation; as time passes, the birth rate decreases.
D
negative correlation; as time passes, the birth rate decreases.
9

Suppose you were to create a scatter plot of outside temperature and amount of heating bill. Would you expect to see a positive, negative, or no relationship between the two variables. Explain your answer.

A
no relationship.
B
positive relationship; as the outside temperature decreases, the amount of the heating bill increases.
C
positive relationship; as the outside temperature increases, the amount of the heating bill increases.
D
negative relationship; as the outside temperature decreases, the amount of the heating bill increases
10

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. Cars Passing School

Question illustration
A
negative; as time passes, the number of cars increases.
B
negative; as time passes, the number of cars decreases.
C
no correlation
D
positive; as time passes , the number of cars decreases.
11

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. Consumer Price Index, 1950-2002 Year Source: Bureau of Labor Statistics, U.S. Dept. of Labor

Question illustration
A
no correlation
B
positive correlation; as time passes, the CPI increases.
C
positive correlation; as time passes, the CPI decreases.
D
negative correlation; as time passes, the CPI decreases.
12

On a scatter plot, what does it mean when both variables are increasing?

A
positive correlation
B
negative correlation
C
no correlation
D
line of best fit
13

Suppose you were to create a scatter plot of the data for speed and distance traveled. Would you expect to see a positive, negative , or no relationship betwen the two variables. Explain your answer.

A
negative relationship; as the speed decreases, the distance increases.
B
positive relationship; as the speed decreases, the distance increases.
C
positive relationship; as the speed increases, the distance increases.
D
no relationship.
14

In a scatter plot or diagram, what is it called when all the points lie approximately along a straight line?

A
positive
B
correlation
C
negative
D
horizontal
15

The following is a scatter plot of the heights and weights of the students in Mr. Baldwin’s PE class. What is the weight of the student who is 75 inches tall? Does the scatter plot show a positive or negative correlation?

Question illustration
A
About 191 pounds; negative correlation
B
About 191 pounds; positive correlation
C
About 185 pounds; negative correlation
D
About 185 pounds; positive correlation
16

Suppose you were to create a scatter plot of the data for speed and distance traveled. Would you expect to see a positive, negative , or no relationship betwen the two variables. Explain your answer.

A
negative relationship; as the speed decreases, the distance increases.
B
positive relationship; as the speed decreases, the distance increases.
C
positive relationship; as the speed increases, the distance increases.
D
no relationship.
17

The following table gives the number of chicken pox cases after 1988. The variable x represents the number of years after 1988. The variable y represents the number of cases in thousands. Year Reported Cases (thousands) 1989 185.4 1990 173.1 1991 147.1 1992 158.4 1993 134.7 1994 151.2 Which scatter plot most accurately depicts the data on the table. a. b. c. d. Please select the best answer from the choices provided

Question illustration
A
A
B
B
C
C
D
D

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