Question
Two different options are under consideration for comparing the lifetimes of three brands of flashlight battery,...
Two different options are under consideration for comparing the lifetimes of three brands of flashlight battery, using 18 flashlights.
a.
One option is to randomly divide 18 flashlights into three groups of 6 flashlights each and then randomly assign each group to use a different brand of battery. Would this statistical design be a completely randomized design or a randomized block design? Explain your answer.
b.
Another option is to use 18 flashlights - six different brands of 3 flashlights each - and randomly assign the 3 flashlights of each brand to use a different brand of battery. Would this statistical design be a completely randomized design or a randomized block design? Explain your answer.
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