Mathematics, 09.05.2020 12:57 Alexandra001
Suppose that you wish to test the effect of lowering the soil ph on the number of lady ferns in an area. The researchers hypothesize that lowering the ph-level of the soil will lead to more ferns. Several plots of forest are randomly chosen and the number of lady ferns counted, before and after the soil has been treated with lime (which lowers the soil ph).
Before Treatment 10 20 13 30
After Treatment 8 15 14 30
Using the sign test, what can be concluded from this experiment?
A. We do not reject the null hypothesis.
B. We reject the null hypothesis.
C. There is no evidence that treating the soil with lime increases the number of ferns.
D. Both (a) and (c)
Answers: 3
Mathematics, 21.06.2019 16:00, juniorvaldez60
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Mathematics, 21.06.2019 18:40, haidenmoore92
Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?
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Mathematics, 22.06.2019 02:00, AnastasiaJauregui
If p(x) is the total value of the production when there are x workers in a plant, then the average productivity of the workforce at the plant is a(x) = p(x) x . (a) find a'(x). a'(x) = xp'(x) − p(x) x a'(x) = xp'(x) − p(x) x2 a'(x) = p'(x) − p(x) x a'(x) = xp'(x) − p'(x) x2 a'(x) = p'(x) − xp(x) x2 why does the company want to hire more workers if a'(x) > 0? a'(x) > 0 ⇒ a(x) is ; that is, the average productivity as the size of the workforce increases. (b) if p'(x) is greater than the average productivity, which of the following must be true? p'(x) − xp(x) > 0 p'(x) − xp(x) < 0 xp'(x) − p'(x) > 0 xp'(x) − p(x) < 0 xp'(x) − p(x) > 0
Answers: 2
Suppose that you wish to test the effect of lowering the soil ph on the number of lady ferns in an a...
Mathematics, 02.09.2020 18:01