.The whole exam is worth 100 points and this question is worth 30 points.In this question you will do a ONE-sample hypothesis test of means using one of the variables from your study.This material is covered in lecture 17.
Use an
a
(or “alpha”) = .05.
(You may do either a one or two tailed test – use the one that makes the most interesting question to you.)
Here is agreat hintfor this problem
State the question you are attempting to answer with your hypothesis test in plain English.Hint: you “test the theory” of what is in Ho and “try to prove” what is in H1.For the plain English cut and paste from my examples either from lecture or practice problems and modify it to fit your variables!
(10 points)
[Type your answer here]
Show the 7 steps for this test in your answer.By the way you do not have to draw the picture of the rejection regions in step 4. If you get step 5 correct then I will be able to figure out what your picture would have looked like! (8 points)
[Insert 7 steps and SPSS output by step 6 here]
If you did not do so in step #7 above already, make sure you explain what your answer means in plain English!
HINT:For the plain English paste from my examples either from lecture or practice problems and modify it to fit your variables!
(10 points)
Mention the assumptions you have violated (if any).You must look at the list of assumptions for this problem from the very top of the corresponding the lecture.Do not simply cut and paste them here.Tell me what you violated and what you assumed (but do not know you violated.HINT: all of you will violate one assumption for sure and may need to “assume” something about your population, depending upon your sample size.For one part of this answer if you say your “test variable is normally distributed in the population” you will receive zero points.See the list of assumptions at the top of the lecture for a better answer and proper wording.(2 points)
Total out of 30 points ______
4.The whole exam is worth 100 points and this question is worth 20 points.In this question you will compute and interpret the p value from the question #3 above.This material is covered in lecture 17.
Insert step 1 your null and alternative hypothesis from your one sample hypothesis test of means in the previous problem:
[Insert null and alternative hypothesis here]
Using the SPSS output, compute the p-value for your answer to question #3.Hint, recall SPSS output provides 2 tailed p-value and a one tailed p-value requires additional calculations.Also recall that p is NEVER equal to zero.If you write p=.000 it is wrong.(See p value lecture for additional information)
Provide your p value below in the following format:“p=___”(10 points)
[Insert both boxes of SPSS output here from the question #3 above]
p=___
[insert your answer in blank]
Using
your
question and
your
p-value, explain what
your
p-value means in plain English regarding statistical decision you made in Step 7 in question #3.(Hint: Pretend your p=.04.
You will receive zero points for
“a p-value of .04 means there is a 4% chance that we are incorrectly rejecting the null hypothesis. Or that we could reject the null hypothesis with a 4% chance of error.”You must apply the plain English of your variable to the answer.See the myriad of examples I have provided in the lectures and practice problems.
HINT:For the plain English of your question you are attempting to answer and in step 7 cut and paste from my examples either from lecture or practice problems and modify it to fit your variables!
)(10 points)
Total out of 20 points ______
P.S. I have all the data for the calculations I in SPSS, I am just stuck on what test value to put in for my null
hypothesis.