a.
To fill: The blanks in thegiven statement with appropriate words.
a.
Answer to Problem 68E
98%, 0.1233 and 5.1007.
Explanation of Solution
Given information:
Confidence interval is the
Thus, the complete statement is, “We are
b.
To find:The 95% confidence interval.
b.
Answer to Problem 68E
The confidence interval is
Explanation of Solution
Given:
Confidence level = 95%
Formula used:
Calculation:
The value of
The 95% confidence interval using the provided output can be calculated as:
Hence, the confidence interval is
c.
To find: The
c.
Answer to Problem 68E
The required sample size is 347.
Explanation of Solution
Given:
Formula used:
Calculation:
The value of
The sample size at
Hence, the sample size is 347.
d.
To find: The sample size to have the margin of error of 1 at
d.
Answer to Problem 68E
The required sample size is 246.
Explanation of Solution
Given:
Formula used:
Calculation:
The value of
The sample size at
Hence, the sample size is 246.
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Chapter 8 Solutions
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