two different options are under consideration for comparing the lifetimes of 3 brands of flashlight batteries, using 18 flashlights.a)one option is to randomly divide 18 flashlights into 3 groups of 6 flashlights each and than randomly assign each group to use a different brand of battery. would this statistical design be completely randomized design or a randomized block design? explainb) another option is to use 18 flashlights- 6 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 completely randomized design or a randomized block design? explain

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