Question 1184953: What the calculation range,variance, and standard deviation of 7,4,2,3,4,5,8,1,9,4
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website! What the calculation range,variance, and standard deviation of  , , , ,, , , , ,
Range:
The range is found by subtracting the smallest data value from the largest data value. Here, the smallest data value is and the largest is . Therefore, the range is:
Variance:
1. The steps that follow are also needed for finding the standard deviation. Start by writing the computational formula for the variance of a sample:
Create a table of columns and  rows. There will be a header row and a row for each data value. The header row should be labeled with  and  .
Enter the data values in the  column, with each data value in its own row. In the second column, put the square of each of the data values, .
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3. Find the sum of all the values in the first column,
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Standard Deviation
Answer:
Range:
Variance: 
Standard deviation: 
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