1.The whole exam is worth 100 points and this question is worth 20 points.In this question you will do a TWO-sample hypothesis test of means using one of the variables from your study.This material is covered in lecture 18.
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.)
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!(5 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]
For Step #6
·report your TR value from SPSS andindicate which of the formulas you used to compute your TR value – forexample: “ I used formula #1.”
The top number in SPSS is Formula 1 (procedure 4 from text and lecture)
The bottom number in SPSS is Formula 2 (procedure 3 from text and lecture)
[Tell me what formula you used 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!
(5 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 TWO populations, depending upon your sample sizes from each of these populations.
For one part of this answer
if you say your “test variable is normally distributed in the two populations” 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 20 points ______
2.The whole exam is worth 100 points and this question is worth 20 points.In this question you will perform aone-way ANOVA test using two variables from your study.This material is covered in lecture 19.
Use an
a
(or “alpha”) = .05.
State the question you are attempting to answer 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!
(5 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! (6 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!
(7 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 “assume” something about your population. For one part of this answer
if you say your “test variable is normally distributed in the populations” 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 20 points ______
3.
The whole exam is worth 100 points and this question is worth 20 points.Perform the seven steps for a Contingency Table Chi-Square test using two of the variables from your study. This material is covered in the second kind of Chi Square in lecture 20.
Use an
a
(or “alpha”) = .05.
State the question you are attempting to answer with your 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!(5 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! (6 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!
(7 points)
Mention the assumptions you have violated (if any).You must look at the list of assumptions for this problem from the lecture.Do not simply cut and paste them here.Tell me what you violated and if you had to assume anything. HINT: all will violate one assumption regarding the type of sample and may have to look at your expected counts. (2 points)
Total out of 20 points ______
4.
The whole exam is worth 100 points and this question is worth 20 points.Perform a simple linear regression test using two of the variables from your study. This material is covered in in lecture 21; you’ll find lecture 21c especially helpful for this problem.
Use an
a
(or “alpha”) = .05.
Provide the SPSS regression output for your two variables.
(insert SPSS output here)
Is your regression significant and why (2 points)?(Note you do NOT have to do 7 steps to tell me whether or not it is significant!You may use the p-value method if desired – it is much easier.)
(insert answer here)
Write out the equation for the regression line.(2 points)
(insert answer here)
What is ther2
?(1 point)
(insert answer here)
Assume you have significant results (even if you do not)and explain what ther2
means in plain English (10 points).
Hint:if your results are not significant r2is actually meaningless so say the following, “If my regression were significant my r2would mean ________but actually r2is meaningless.”
(insert answer here)
Correlation
Provide the SPSS correlation output for your two variables.
(insert SPSS output here)
Is your correlation significant and why (1 points)?(Note you do NOT have to do 7 steps to tell me whether or not it is significant!You may use the p-value method if desired – it is much easier.)
(insert answer here)
What is yourr (or coefficient of correlation)?(1 points)
(insert answer here)
Assume you have significant results (even if you do not)and explain what thermeans in plain English (3 points).
Hint:if your results are not significant r is actually meaningless so say the following, “If my correlation were significant my r would mean ________but actually r is meaningless.”
Total out of 20 points ______
(insert answer here)
5.
The whole exam is worth 100 points and this question is worth 20 points.Perform a multiple regression test using the variables below from your study. This material is covered in in lecture 22; you’ll find lecture 22c especially helpful for this problem.
Use an
a
(or “alpha”) = .05.
You must use the following variables unless you receive emailed permission from me to use other variables.It is okay to use others, but we need to talk about it first.
Dependent variable (y) – monthly income in exact numbers (must be ratio level not coded into categories)
Independent variables (x)
·x1=agethis should be age in exact years (must be ratio level not coded into categories)
·x2=gender(female=1male=0)
Provide frequency distributions from SPSS for your three variables:monthly income, age, and gender. Make sure female is coded 1 and male is coded 0.
Provide two versions of your frequency distributions of gender as I do below so I know you coded gender with females =1 correctly.
(insert four frequency distribution tables from SPSS here)
Provide the SPSS multiple regression output using income as dependent variables and age and gender as independent variables.
(insert SPSS multiple regression output here)
Is your overall multiple regression significant model and why (2 points)?(Here you MUST use the p-value method.)
(insert answer here)
Write out the equation for the multiple regression line.(3 points)Recall, y-hat=a + b1x1+ b2x2(where a = y intercept, b1= slope for age, and b2=slope for gender)
y-hat=_____ + _____x1+ _____x2
(insert y intercept,slopes or unstandardized coefficients from SPSS in the spaces)
Interpret the unstandardized coefficient or slope of the ratio level independent variable age on the dependent variable monthly income. (5 points) HINT:
if your results are not significant say the following,“If this variable were significant the unstandardized coefficient or slope would mean ________but actually this coefficient is meaningless.”
Interpret the unstandardized coefficient or slope of the “dummy” independent variable gender on the dependent variable monthly income. (5 points)HINT:
if your results are not significant say the following,
“If this variable were significant the unstandardized coefficient or slope would mean ________but actually this coefficient is meaningless.”
Interpret the standardized coefficient or “Beta” of either age or gender on the dependent variable monthly income.It does not matter which you choose. (5 points)HINT:
if your results are not significant say the following,
“If this variable were significant the standardized coefficient would mean ________but actually this coefficient is meaningless.”
Total out of 20 points ______