Concept explainers
a.
Find an equation for the regression line.
a.
Answer to Problem 13PPS
Equation for the regression line
Explanation of Solution
Given information: The table shows the number of participant in high school athletics.
Year Since 1980 x | 0 | 10 | 20 | 25 | 30 |
Athletes y | 5356913 | 5298671 | 6705223 | 7159904 | 7667955 |
Formula used:
The equation for the regression line is given below.
Calculation:
b.
According to the equation, how many participated in 2008.
b.
Answer to Problem 13PPS
Number of participants are in 2008 is
Explanation of Solution
Given information: The table shows the number of participant in high school athletics.
Year Since 1980 x | 0 | 10 | 20 | 25 | 30 |
Athletes y | 5356913 | 5298671 | 6705223 | 7159904 | 7667955 |
Formula used:
The equation for the regression line is given below.
Calculation:
To estimate the number of participants in 2008, evaluate the regression equation for x = 28 because 2008 is 28 years after 1980.
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