Question

An environmentalist do a study to investigate the effects of a specific herbicide in fish. Has 60 healthy fish and randomly distributes any fish or in the experimental group or the control group. The fish in the experimental group have higher indices enzymes.

Answer 1

1) Suppose that the statistical test was well designed and showed no statistically significant difference between the average enzyme levels in fish exposed to the herbicide and those not exposed. What conclusion can make a graduate student from these results?
a) The researcher did not correctly interpret the results. Should there be a significant difference.
b) The sample size may be too small to give a statistically significant difference.
c) It must be true that the herbicide does not cause higher levels of enzymes

Answer 2

I believe the correct answer is b. What do you think?

Answer 3

2) Suppose that the statistical test was well designed and showed a statistically significant difference between the average enzyme levels in fish exposed to the herbicide and those not exposed. What conclusion can make a graduate student from these results?
a) There are indications of correlation but no causal relationship between the herbicide and the level of enzymes.
b) The sample size is too small to draw reliable conclusions.
c) The test demonstrated that the herbicide causes higher levels of enzymes.
d) There is evidence that the herbicide caused higher levels of enzymes in these fish.

Answer 4

I believe that the correct answer is the d. What do you believe?

Answer 5

Thank you very much!! Somebody else?

Answer 6

@heather040200 i posted an other question in Statistics can you help me please?

Answer 7

I agree with your answers on both questions.

Answer 8

@gypsy1274 Thank you a lot.... I posted some more questions if you can help I would really appreciate it. Thank you a lot!!

Answer 9

@Social Unfortunately, I cannot help you with the other problem. I don't know the answer to that one.

Answer 10

i have one more question but i do not know how i can post it, i am new here...

Answer 11

What don't you know how to post? Is it a formula or equation?

Answer 12

no no ...just words..but i do not see somewhere for a new question.. I have to post everuthing under here?

Answer 13

On my screen, there is a box on the top right that says "Ask a question..."

Answer 14

on my screen there is not... maybe i have to do something else first...i do not know..i will try to ask it here..

Answer 15

It is a multiple choice question, so choose one from a,b,c please. I believe the correct is c. What do you think?

Answer 16

ri lives about 10 minutes away from the college to which he intend to attend a summer seminar of 10 weeks. There are two main routes that can be followed to reach the college, the first in the city and the other from the countryside. The city's way is shorter but with more traffic lights. The route of the countryside is more miles but has fewer traffic lights and stop signs. Ari performs a randomized experiment where everyday chooses the path to follow throwing a coin. Records data for five days following each of the routes.

Answer 17

countryside: 17, 15, 17, 16, 18
city: 18, 13, 20, 10, 16

It is important for Ari to not arrive late to class, but not reach too early, because this increases his costs for parking. Based on the data collected, which route would you suggest Ari to use?

Answer 18

a) The way of the countryside, because the time vary consistently between 15 and 18 minutes.

b) The way of the city, because under normal conditions can reach its destination in 10 minutes and the average time is less than the distance of the countryside.

c) The averages of the two paths are similar to the extent that any path not appear better than the other. The best he could do is to decide to chance.

Answer 19

*****The first word is Ari

Answer 20

This question is very subjective, I can't be sure of having the correct answer. I agree that the reality of parking costs is that there will be no difference in cost by adding 10 minutes. However, It seems like in this question that those few minutes are meant to make a difference. Maybe parking is charged by the minute and not the hour? :-)
I would think that the answer would be A because the time is more consistent and the average time is not much greater than the city path.

I also believe this question to be too subjective as there really isn't much difference in either path to make a difference in reality. It all depends on the writer's perspective.

Answer 21

@gypsy1274 Thank you so much.. yea i was not sure. it depends on the writers. i am between c and a. So you suggest the a?

Answer 22

and one more...

Answer 23

A researcher is designing a research study. He hopes to show that the results of an experiment are statistically significant. What size of p value would take?

a) Large value of p
b) Small value of p
c) The size of the p value does not affect the statistical significance

I believe the correct answer is b. What do you believe?

Answer 24

Just to be clear...I am the last person on earth you should be asking to interpret someone else's words/meaning/intentions - I'm never very good at it. I can see arguments for both answers.

Answer 25

With this question, you are getting into the details of statistics. I don't know the answer. and when answering the previous question, also keep in mind that I have not taken statistics in a few years. I can repost this question for you, see if someone else answers.

Answer 26

Thank you very much i appreciate it.. i will see it on the morninh...good night