Statistics Examples

Find the Mean of the Frequency Table table[[Class,Frequency],[360-369,2],[370-379,3],[380-389,5],[390-399,7],[400-409,5],[410-419,4],[420-429,4],[430-439,1]]
Step 1
Find the midpoint for each class.
Step 2
Multiply the frequency of each class by the class midpoint.
Step 3
Simplify the column.
Step 4
Add the values in the column.
Step 5
Add the values in the frequency column.
Step 6
The mean (mu) is the sum of divided by , which is the sum of frequencies.
Step 7
The mean is the sum of the product of the midpoints and frequencies divided by the total of frequencies.
Step 8
Simplify the right side of .
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