(02.04 LC)
There are two types of hot-water heaters: tank and inline. An experiment is to be
conducted to determine whether the life of the hot-water heater is the same for both
types of hot-water heaters. In previous studies, it was determined that family size (small,
medium, large) is associated with life expectancy of the water heater, but house size
(small, medium, large) is not associated with life expectancy of the water heater How
would blocking best be used? (4 points)
By blocking on house size
By blocking on type of hot water heater
Blocking is not suggested
By blocking on family size
By blocking on life expectancy