A developer wants to develop a 25-acre subdivision. He figures that the streets and common area will take up about 35% of this o
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<span>The variance method is as follows.
-Sum the squares of the values in data set, and then divide by the number of values in data set
- From that, subtract the square of the mean (add all values and divide by number of values in the data set)
Our variance is
<span>
Since variance has to be 14, we set
and solve for m
quadratic formula
-4 doesnt' work as it is not a positive integer
m = 11
</span></span>
-Sum the squares of the values in data set, and then divide by the number of values in data set
- From that, subtract the square of the mean (add all values and divide by number of values in the data set)
Our variance is
<span>
Since variance has to be 14, we set
quadratic formula
-4 doesnt' work as it is not a positive integer
m = 11
</span></span>
check the picture below.
so x = b + b = √(180) + √(180).
