Learning objective: Variance has squared units and so in changing units the variance will grow (shrink) with the square of the growth (shrinkage) of units.
A closet that is 1 yard by 4 yards has 4 square yards of space. How many square feet of space does that closet have (remember: 3 feet = 1 yard)?
The number of square feet by a factor of times the rate for the number of square yards.
The area of a room x feet by x feet varies with what function of x?
Please answer question 3 to unlock this question.
When a change of units results in bigger numbers, the variance: