A student wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. To test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. The student measured the growth at the end of the week. All plants received equal amounts of water and sunlight.
a: 2cm
b: 4cm
c: 6cm
d: 12cm
What is the mean height for the grass used as a control?
Mean height for control ( water and fertilizer) would be a: 2cm.. would be total growth divided by number of weeks.. in this case 6/3 = 2. Hope this helps
