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

A banana grower has three fertilizers from which to choose. He would like to determine which fertilizer produces banana trees with the largest yield (measured in pounds of bananas produced). The banana grower has noticed that there is a difference in the average yields of the banana trees depending on which side of the farm they are planted (South Side, North Side, West Side, or East Side), therefore, a randomized block design is used in the study. Because of the variation in yields among the areas on the farm, the farmer has decided to randomly select three trees within each area and then randomly assign the fertilizers to the trees. After harvesting the bananas, he calculates the yields of the trees within each of the areas. Can the banana grower conclude that there is a significant difference among the average yields of the banana trees for the three fertilizers? The results are as follows.  Average Yield of Banana Trees Side of Farm Fertilizer A Fertilizer B Fertilizer C…

In a large clinical​ trial, 392,553 children were randomly assigned to two groups. The treatment group consisted of 195,331 children given a vaccine for a certain​ disease, and 36 of those children developed the disease. The other 197,222 children were given a​ placebo, and 129 of those children developed the disease. Consider the vaccine treatment group to be the first sample. Identify the values of n1​, p1​, q1​, n2​, p2​, q2​, p​, and q.

In a large clinical​ trial, 394,108 children were randomly assigned to two groups. The treatment group consisted of 198,537 children given a vaccine for a certain​ disease, and 30 of those children developed the disease. The other 195,571 children were given a​ placebo, and 105 of those children developed the disease. Consider the vaccine treatment group to be the first sample. Complete parts​ (a) through​ (d) below.