Test the effect of lowering the soil ph

Assignment Help Basic Statistics

Reference no: EM13102317

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).

a) Using the sign test, what can be concluded from this experiment?

b) We do not reject the null hypothesis.

c) We reject the null hypothesis.

d) There is no evidence that treating the soil with lime increases the number of ferns.

e) Both (a) and (c)

Reference no: EM13102317

Questions Cloud

Probability that fifth fish caught is the first young fish : When a fisherman catches a fish, it is a young one with a probability of 0.23 and is returned to the water. On the other hand, an adult fish is kept to be eaten later.

Normal distributions-z scores and probabilities : A continuous random variable, x, is normally distributed with a mean of $1000 and a standard deviation of $100. Convert each of the following x values into its corresponding z-score.

Explain human behavior deviant in one society : When the crime is committed by someone who has powerful status in this society, how is their deviant behavior tackled in comparison to someone who has less power in society?

Worldwide transfer of knowledge and innovation : Do you believe it is possible for a global industry to simultaneously achieve the goals of global efficiency and integration, national responsiveness and flexibility and the worldwide transfer of knowledge and innovation?

Test the effect of lowering the soil ph : 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.

Question on poisson distribution : What type of probability distribution will most likely be used to analyze the number of chocolate chip parts per cookie in the following problem?

Estimating statistics - probability : It has been reported that the average US office worker receives 14 fax messages per day. For purposes of this exercise, we will assume that the daily number of fax messages is normally distributed with a standard deviation of 5.0 messages.

Differences in true average lumen outputs : The sums of squares were computed as SSW = 4773.3 and SSA = 591.2. Use the F test of ANOVA (assume α = 0.05) to decide whether or not there are any differences in true average lumen outputs between the three brands for this type of light bulb.

Explain economy-political life-bourgois righteous dopefiend : Explain the economy, political life, and expressive culture of addicts in Bourgois' "Righteous Dopefiend." Where does responsibility for these tragic lives lie?

User Account

All Pages