Mathematics, 30.05.2020 23:03 aedmund1225

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: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 13:00, dianaherrera041

The composite figure is made up of a parallelogram and a rectangle. find the area. a. 76 sq. units b. 48 sq. units c. 124 sq. units d. 28 sq. units

Answers: 1

continue

Mathematics, 21.06.2019 15:00, jonesromari

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Answers: 3

continue

Mathematics, 22.06.2019 02:30, Meiyuh1

The interior angles formed by the sides of a hexagon have measures that sum to 720°. what is the measure of angle a? enter your answer in the box. m∠a= °

Answers: 3

continue

Mathematics, 22.06.2019 02:30, jujurocks10

Which problem would you use the following proportion to solve for? 24/x = 40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?

Answers: 1

continue

You know the right answer?

Suppose that you wish to test the effect of lowering the soil ph on the number of lady ferns in an a...