a.
To explain: The effect of increase in confidence level on the margin of error.
a.
Answer to Problem 10CRE
It increases the margin of error.
Explanation of Solution
The margin of error is said to be directly related to the margin of error. The rise in the confidence level leads the increase in margin of error and vice versa. So, the increase in the confidence level would lead increase in the margin of error.
b.
To explain: The effect of quadrupling the
b.
Answer to Problem 10CRE
It would reduce the margin of error.
Explanation of Solution
The margin of error is said to be inversely related to the margin of error. The rise in the size of the sample leads the reduction in margin of error and vice versa. So, the increase in the ssample size would lead reduction in the margin of error.
Chapter 8 Solutions
The Practice of Statistics for AP - 4th Edition
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