Concept explainers
(a)
To explain why this result does not give convincing evidence that more than half of the school’s student brush their teeth with the water off.
(a)
Explanation of Solution
It does not give convincing evidence that more than half of the school’s student recycle because:
In the given dot plot we note that the proportion of
Thus it is very likely to obtain a proportion of
(b)
To explain why this result gives strong evidence that fewer than
(b)
Explanation of Solution
This result gives strong evidence that a majority of the school’s students recycle because:
In the given dot plot we note that the proportion of
Thus it is very likely to obtain a proportion of
Hence the result.
Chapter 5 Solutions
The Practice of Statistics for AP - 4th Edition
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