Concept explainers
(a)
To verify that the
(a)
Answer to Problem 18E
Yes, it is
Explanation of Solution
It is given in the question that,
The degrees of freedom is the
The critical t -value can be found in table B in the row of
Thus, the confidence interval is as:
We are
(b)
To explain why an appropriate pair of hypotheses for this test is
(b)
Explanation of Solution
Now, the researchers have claimed that the typical driver puts
And the alternative hypothesis states the opposite of the null hypothesis as:
(c)
To explain what conclusion would you draw for this significance test based on your interval in part (a).
(c)
Explanation of Solution
We have define the hypotheses in the part (b) as:
And the confidence interval calculated in part (a) is as:
There is a
Thus, the confidence interval does not contain
Chapter 12 Solutions
The Practice of Statistics for AP - 4th Edition
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