Concept explainers
a)
To find sample standard deviation.
a)
Answer to Problem 79E
The sample standard deviation is 91.2547 mm
Explanation of Solution
Given:
Formula:
Standard error:
Calculation:
Using the formula,
b)
To find the actual confidence level.
b)
Answer to Problem 79E
The actual confidence level is 66%
Explanation of Solution
Given:
Calculation:
The degrees of freedom =df = n-1= 23-1 = 22
Therefore, the confidence level can be found using excel formula,
=2*TDIST(1,22,2)
So confidence level = 66%
Chapter 8 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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