I have a statistics final due tomorrow. I have to submit it online. I am failing this class...so I don't want to make an A+ on the final, I want to make about a low B...

I will have to provide the SPSS data material, but here is the final:

. The Mallard Fillmore cartoon strip has consistently made jokes arguing college professors are more liberal than the typical citizen. You take a random survey 50 UTA faculty and 50 DFW eligible voters and whether they are liberal or conservative (based on their personal assessment).

Liberal Conservative

College professor 30 20

Typical citizen 28 22

a) Provide null and alternative hypotheses in formal terms and layperson's terms for a chi-square two-sample test (10)

b) Do the math and reject/accept at a=.05. Be sure to include a strength of association measure if warranted. (25)

c) Explain the results in layperson's terms (25)

2. SUPA wonders if a particular starting class starts affects how long it takes to find a parking space. They consider two starting class times, 7 PM and 6:30 PM and take a sample of 10 students, asking them how long it takes them to find a parking space from the time they enter campus on a specific night (chosen to be the same for each starting time).

7 PM - 15, 20, 25, 25, 20 6:30 PM – 10, 15, 20, 20, 12

a) Is a t-test for dependent or independent samples correct here and why?

b) Provide null and alternative hypotheses in formal terms and layperson's terms for the test (10)

c) Do the math and reject/accept at a=.05 (25)

d) Explain the results in layperson's terms (25)

e) Calculate and explain a 95% confidence interval in layperson's terms if appropriate. If not, you must explain why not. (15)

3. The UTA Graduate Admissions office is interested in whether there is a relationship between age and amount owed in student loans for current students. They collect a random sample of eight students. Dollars are in thousands,

Student Loan Debt Age in Thousands

25 3 30 5 40 7 25 4 30 3 40 7 35 3 25 4 a) State your null formally and in lay terms for a simple regression (10)

b) Calculate r and the regression line (y = a + bx) and reject/accept at a=.05. You must state the estimated regression line even if Ho is accepted. (30)

c) Explain your findings in lay terms using r-square, r, b (40)

d) Calculate a 95% confidence interval for the slope and explain in layterms. If not appropriate, explain why. (10)

e) Calculate a 95% confidence interval for Y when X is “30” and explain in layterms. If not appropriate, explain why. (10)

4. Do 21.9 in the multiple regression readings:

a) State the null and alternative hypothesis for each independent variable (10 each variable)

b) Calculate the t values for the slopes and indicate which are significant (reject/retain Ho) (10 each variable)

c) Interpret in layterms each slope including the p-value (10 each variable)

d) Indicate the strength of the model. That is interpret R-square, Adju R-Square. (15)

5. You asked to test if there is a relationship between the % of people who read (dept) and the % living in cities in a country. You have U.N. data for countries in 2005 (USE WORLD.SAV).

a) State your null formally and in lay terms for a simple regression (10)

b) Run SPSS (provide output). State the regression line and reject/accept at a=.05. (30)

c) Explain your findings in lay terms using r-square, r, b (25)

d) Provide and explain the 95% confidence interval for the slope and explain in layterms. If not appropriate, explain why. (10)

e) Calculate a 95% confidence interval for Y when X is “25” and explain in layterms. If not appropriate, explain why. (10)

DO EITHER 6 OR 7 BUT NOT BOTH

6. You have been asked to test if there is a difference in the average months since hiring across gender for bank for employees at a state’s fish and wildlife division. Note that in the dataset male is coded “m” and female “f” (not 0,1 or 1, 2). (USE EMPLOYEE.SAV)

a) Provide null and alternative hypotheses in formal terms and layperson's terms for the t-test for independent samples test (10)

b) Run and provide the SPSS output (25)

c) Explain the results in layperson's terms (25)

c) Provide and explain a 95% confidence interval in layperson's terms if appropriate. If not, you must explain why not. (15)

7. You have been asked to test if there is a relationship between gender and who someone voted for in the 1992 Presidential Election (Bush. Perot, Clinton). (USE VOTER.SAV)

a) Provide null and alternative hypotheses in formal terms and layperson's terms for a chi-square two-sample test (10)

b) Run and provide the SPSS output (25)

c) Explain the results in layperson's terms using a strength test if needed (40)

Subject | Mathematics |

Due By (Pacific Time) | 08/11/2013 11:00 am |

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