Concept explainers
(a)
To calculate the population,
(a)
Answer to Problem 20E
The population mean is
The value of population standard deviation is
Explanation of Solution
Given information:
Year: Winner | Age |
Formula used:
Obtain the population mean by using the formula is given below:
The formula for population standard deviation is given below.
Calculation:
Obtain the population mean by using the formula is given below:
Thus, the population mean is
Compute tile population standard deviation
Tile formula for population standard deviation is given below:
Substitute
Thus, the value of population standard deviation is
(b)
To calculate the
(b)
Answer to Problem 20E
The simple random sample of size
Explanation of Solution
Formula used:
Calculation:
The simple random sample of size
(c)
To calculate the mean and standard deviation.
(c)
Answer to Problem 20E
Explanation of Solution
Formula used:
Calculation:
Compute the sample mean
Sample |
Sample |
Sample |
Sample |
||
Compute the mean
Sample |
Sample |
|||
Mean |
Compute the standard deviation
(d)
To calculate the sample, mean for all 25 samples for size 2 and also calculate the
(d)
Answer to Problem 20E
Explanation of Solution
Formula used:
The formula for population standard deviation is given below.
Calculation:
Verify that
Hence
Find the
Thus, the standard deviation of
Hence,
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Chapter 7 Solutions
Elementary Statistics 2nd Edition
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