(a)
To Explain: the suitable test of this belief and the conclusion.
(a)
Answer to Problem 55E
Yes
Explanation of Solution
Given:
Formula used:
Calculation:
Test hypothesis:
The test statistic:
Degrees of freedom
The P-value is
In the output it is observed that the exact P-value is 0.0104/2 = 0.0052, because the test is one-sided and the P-value in output is two-sided).
The null hypothesis is rejected if the P-value is less than or equal to the significance level:
There is strong proof to help the claim that the knee velocity would be greater for skilled rowers.
(b)
To construct: and interpret a 90 percent confidence interval for the mean difference for the provided information.
(b)
Answer to Problem 55E
0.4683, 1.8757
Explanation of Solution
Given:
Formula used:
For the confidence interval
Calculation:
Determine the degrees of freedom:
Finding
Confidence interval for
90 percent believe that the mean difference is between 0.4683 and 1.8757.
(c)
To Explain: the two results with the comparison with the clarification.
(c)
Explanation of Solution
Technology uses a higher degree of freedom than there would use it when using table B, which would result in technology providing a smaller t-value
Chapter 10 Solutions
The Practice of Statistics for AP - 4th Edition
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