Chapter 9 Review

What type of association is shown in the scatter plot?

• positive linear association

• negative linear association

• positive nonlinear association

• no association

Which of the following statements is best supported by the scatter plot?

• As the age of a person increases, the time spent in physical activity increases.

• As the time spent in physical activity increases, a person’s age increases.

• As the age of a person increases, the time spent in physical activity decreases.

• There is no relationship between the age of a person and his or her amount of physical activity.

Which of the following is a reasonable estimate for the daily amount of physical activity for a person who is 50 years old?

• 6 hours

• 4 hours

• 2 hours

• 5 hours

Which of the following is the most reasonable equation for the line of best fit?

Which of the following is the most reasonable estimate for the length of a spring when 20 weights are attached?

• 25 inches

• 54 inches

• 39 inches

• 62 inches

What is the relative frequency of students that do not play an instrument and do not like classical music to the total number of students who do not play an instrument? Round to the nearest hundredth.

• 0.10

• 0.83

• 0.88

• 0.89

Which of the following is a valid conclusion about the data?

• Of the students that like classical music, most do not play a musical instrument

• Of the students that like classical music, most play a musical instrument

• There were a total of 27 students surveyed

• Most of the students surveyed like classical music

What are the first and third quartiles of the data?

• 2, 12

• 4.5, 8

• 3, 10

• 3.5, 9

Use the two-way table to determine the relative frequency of students who play a sport and like football to the total number of students plays a sport. Round to the nearest hundredth.

• 0.63

• 0.25

• 0.83

• 0.50

A behavioral study measured the number of positive responses received for a certain product during the 21 hours that it was sold. Fifteen pairs of data are represented in the scatter plot. The professor later studied the diagram to analyze if there was any correlation between the number of positive responses and time.

• no association

• nonlinear association

• linear association