The Relationship between Two Quantitative Variables — Quiz

Question 1

Which scatterplot demonstrates the strongest relationship between two quantitative variables?

Revolt · Accepted Answer

Image with description A scatter plot has x on the x-axis, and y on the y-axis. Points increase tightly together.

Question 2

Medical researchers studying a medication in male and female patients 20 to 29 years old noticed that, up to a certain amount, a larger concentration of an active ingredient lead to greater levels of symptom relief. What is the explanatory variable?

Revolt · Accepted Answer

concentration of active ingredient

Question 3

At a dome-style football stadium, sports analysts noticed that as the distance of a field-goal attempt increased, the success rate of a field-goal attempt decreased. What are the explanatory variable and response variable for this relationship?

Revolt · Accepted Answer

Explanatory variable: distance of field-goal attempt Response variable: success rate of field-goal attempt

Question 4

Which scatterplot demonstrates the strongest relationship between two quantitative variables?

Revolt · Accepted Answer

Image with description A scatter plot has x on the x-axis, and y on the y-axis. Points curve up and then down in a line.

Question 5

Football coaches running their summer practices noticed that the players who weighed more typically had slower times for their 40-yard dash. What are the explanatory variable and response variable for this relationship?

Revolt · Accepted Answer

Explanatory variable: player weight Response variable: player 40-yard-dash time

Question 6

During a particularly dry growing season in a southern state, farmers noticed that there is a delicate balance between the number of seeds that are planted per square foot and the yield of the crop in pounds per square foot. The yields were the smallest when the number of seeds per square foot was either very small or very large. What is the explanatory variable for this relationship?

Revolt · Accepted Answer

number of seeds planted per square foot

Question 7

Real estate agents in a county with a large, urban residential area noticed that families with larger incomes tend to live in homes that sell for higher prices. What are the explanatory variable and response variable for this relationship?

Revolt · Accepted Answer

Explanatory variable: family income Response variable: price of the home

Question 8

Exercise science researchers collecting data within their state noticed that teens who spend more time streaming videos spend less time exercising. What are the explanatory variable and response variable for this relationship?

Revolt · Accepted Answer

Explanatory variable: time spent streaming videos Response variable: time spent exercising

Question 9

Auto technicians working at a shop in a rural residential area noticed that the depth of tire treads was smaller among cars that have more miles on the odometer. What are the explanatory variable and response variable for this relationship?

Revolt · Accepted Answer

Explanatory variable: miles on the car odometer Response variable: depth of tire tread

Question 10

Which scatterplot represents the player data?

Revolt · Accepted Answer

Image with description A scatter plot titled Weight and 40-Yard Dash Times. The horizontal axis ranges from 170 to 210 in increments of 5 and is titled weight in pounds. The vertical axis ranges from 4 point 30 to 4 point 6 5 in increments of 0 point 0 5 and is titled 40-yard time in seconds. Some significant points on the graph are (175, 4 point 3 2), (180, 4 point 3 2), (180, 4 point 3 9), (180, 4 point 5), (185, 4 point 3 6), (188, 4 point 5 1), (190, 4 point 5), (190, 4 point 5 2), (190, 4 point 5 4), (191, 4 point 5 3), (200, 4 point 4 3), (200, 4 point 5 4), (209, 4 point 4 6), and (209, 4 point 5 2).

The Relationship between Two Quantitative Variables — Quiz Answers

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