Concept explainers
(a)
To explain: the value r = 0.87.
(a)
Answer to Problem 21E
The
Explanation of Solution
Given:
The correlation of 0.87 confirms what we see in that scatterplot; there is a moderately strong, positive linear relationship between calories and salt content (measured as milligrams of sodium) in 17 brands of meat hot dogs.
(b)
To find: the effect of removing the hot dog brand.
(b)
Answer to Problem 21E
It would increase the correlation.
Explanation of Solution
Removing the outlier with the lowest calorie content would increase the correlation since the remaining 16 points are more tightly clustered in a linear pattern.
Chapter 3 Solutions
The Practice of Statistics for AP - 4th Edition
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