To find: The standard deviations and describe why it is a good idea to choose larger standard deviation.
Answer to Problem 111E
Solution: The standard deviations are
Explanation of Solution
Calculation: To calculate the standard deviation for four regions with reference to Exercise 7.85 and Exercise 7.86, on excel following steps were followed:
Step 1: Open the data set for exercise 7.85. The partial screenshot is shown below:
Step 2: Write the standard deviation formula
Step 3: Write the standard deviation formula
Step 4: Open the data set for exercise 7.86. The partial screenshot is shown below:
Step 5: Go to the Write the standard deviation formula
Step 6: Write the standard deviation formula
To see the impact of standard deviation on power statistic, consider arbitrary choose some different
The power can be calculated as:
The power can be calculated as:
The power can be calculated as:
Noise is the unexpected variation in experiments. To consider their effect, it is recommended to choose larger value of
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Chapter 7 Solutions
Introduction to the Practice of Statistics: w/CrunchIt/EESEE Access Card
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