A test is conducted to compare four different brands of batteries to determine if there is any difference in the average life,in hours,they provide under laboratory conditions.Ten different electronic devices are selected and each device uses all three brands of batteries in a random order.The number of hours is recorded for each battery used.This is an example of a(n)_________ experimental design.

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The Answer of A test is conducted to compare four different brands of batteries to determine if there is any difference in the average life,in hours,they provide under laboratory conditions.Ten different electronic devices are selected and each device uses all three brands of batteries in a random order.The number of hours is recorded for each battery used.This is an example of a(n)_________ experimental design.

A Test Is Conducted to Compare Four Different Brands of Batteries