Identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design. currently, there is no approved vaccine for the prevention of infection by a certain virus. a clinical trial of a possible vaccine is being planned to include subjects treated with the vaccine while other subjects are given a placebo. the most appropriate is randomized block design. identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design. currently, there is no approved vaccine for the prevention of infection by a certain virus. a clinical trial of a possible vaccine is being planned to include subjects treated with the vaccine while other subjects are given a placebo. the most appropriate design

Completely Randomized Design

Step-by-step explanation:

In a completely randomized design, the samples are randomly assigned to the treatment without creating any blocks or groups.

Like here, in the given scenario, we do not have to divide subjects in two groups as they are all same.

Whereas, in a randomized block design, the participants are divided into subgroups in a way, that the variability within the blocks is less than the variability between blocks.

After dividing, the participants within each block are randomly assigned to treatment conditions.

Hence, the completely randomized design is used here.

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3