Sal purchased two types of plant fertilizer and conducted an experiment to see which fertilizer would be best to use in his greenhouse. He planted 20 seedlings and used Fertilizer A on ten of them and Fertilizer B on the other ten. He measured the height of each plant after two weeks. What conclusion can Sal make about the plant fertilizers? Sample number

Fertilizer A

Fertilizer B

1

19.8

23.4

2

25.7

30.1

3

29.0

28.5

4

23.2

26.3

5

27.8

32.0

6

31.1

29.6

7

26.5

26.8

8

24.7

25.2

9

21.3

27.5

10

25.6

30.8

A.
No conclusion can be made because the experiment is biased.

B.
The range of heights for plants with Fertilizer B is less than Fertilizer A.

C.
Fertilizer B will outperform Fertilizer A every time.

D.
On average Fertilizer A produces a taller plant.