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| PAGE: 770 | SET: Exercises | PROBLEM: 42 |
The set of data is 
.
Find the mean.
Add the numbers and then divide by the number of values in the data set.
(Add: 
)
(Divide: 
)
The mean is 
.
Find the variance.
Square the difference between each number and the mean.
Then add the squares, and divide by the number of values.
(Add: 
)
. (Divide: 
)
The variance is 
.
Find the standard deviation.
The standard deviation is the square root of the variance.
(Variance)
(Take the square root of the variance)
(Cancel the square root)
. (Use calculator)
The standard deviation is 
.
The mean is 
.
The variance is 
.
The standard deviation is 
.
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