It is believed that number of people who attend a Mardi Gras parade each year depends on the temperature that day. A regression has been conducted on a sample of years where the temperature ranged from 28 to 64 degrees and the number of people attending ranged from 8400 to 14,600. The regression equation was found to be = 2378 + 191x. Which of the following is true?
A) The average change in parade attendance is an additional 2378 people per one-degree increase in temperature.
B) The average change in parade attendance is an additional 191 people per one-degree increase in temperature.
C) If the temperature is 75 degrees, we can expect that 16,703 people will attend.
D) If the temperature is 0 degrees this year, then we should expect 2378 people to attend.

Question

Quizplus · Accepted Answer

In a regression equation of the form y = mx + b, m represents the slope or the average change in the dependent variable (y) for each one-unit increase in the independent variable (x). Here, 191 is the coefficient of x (temperature), indicating the average change in parade attendance per one-degree increase in temperature.

It Is Believed That Number of People Who Attend a Mardi