Organizing Data

Question 1

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.

Revolt · Accepted Answer

negative relationship; as the outside temperature decreases, the amount of the heating bill increases

Question 2

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

Revolt · Accepted Answer

B

Question 3

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

Revolt · Accepted Answer

positive correlation

Question 4

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

Revolt · Accepted Answer

positive correlation; as time passes, the SUV sales increase.

Question 5

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?

Revolt · Accepted Answer

About 185 pounds; positive correlation

Question 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. Consumer Price Index, 1950-2002 Year Source: Bureau of Labor Statistics, U.S. Dept. of Labor

Revolt · Accepted Answer

positive correlation; as time passes, the CPI increases.

Question 7

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.

Revolt · Accepted Answer

positive relationship; as the speed increases, the distance increases.

Question 8

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?

Revolt · Accepted Answer

82

Question 9

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

Revolt · Accepted Answer

negative correlation; as time passes, the birth rate decreases.

Question 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. People Entering Amusement Park Time (minutes)

Revolt · Accepted Answer

positive; as time passes, the number of people entering increases.

Organizing Data Answers

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