Writers Den

PUBH
6033—Week 7 Assignment 1

Comparing two means: When drink drove a student to
statistics

(Rubric included)

Instructions

For this assignment, you review this
week’s Learning Resources and then perform a
two-sample independent t test and an ANOVA related to the dataset that was
utilized in the week 2 SPSS application assignment. Import the data into SPSS;
or, if you correctly saved the data file in Week 2, you may open and use that
saved file to complete this assignment. Type your answers to all questions
directly into the worksheet, and paste the required output at the end of this
document.

Submit this Application Assignment by Day 7.

———————————————————————————————————————

Research Scenario

A study was conducted to determine if a
walking plus strength training exercise program results in a significantly
greater increase in aerobic capacity as compared to a walking only exercise
program. Participants are randomly
selected and then randomly assigned to one of the exercise groups. Participants’ aerobic endurance was assessed
at the beginning of the study and, again, after 6-months of exercise.

Coding for study variables:

·
AGE—age in years

·
SEX—1 =male, 2=female

·
EXERCISE—1=walking and strength training; 2 = walking;

·
CHNG_ENDUR—change in maximal oxygen
uptake (liters per minute)from pre-test to
post-test

———————————————————————————————————————

Note:
Save all of your SPSS output. You will
paste copies in Steps 7–9, below.

Step 1: Review this week’s Learning Resources.

Step 2: Import the Microsoft Excel data file
provided in this week’s Learning Resources into SPSS (or open saved file from
Week 2 Application Assignment).

Step 3: Run and save the Codebook for your SPSS
data file

Step 4: Conduct an independent samples t test to
determine if there is a difference between the exercise type 1 in terms of
changes in maximal oxygen uptake. Note that
the independent variable is EXERCISE, and the dependent variable is CHNG_ENDUR.
For this analysis, choose a two-tailed test of significance.

Step 5: Conduct a between-subjects ANOVA to
determine if there is a difference between sex (males vs. females) and
CHNG_ENDUR. Note that the independent
variable is SEX, and the dependent variable is CHNG_ENDUR. For this analysis,
choose a two-tailed test of significance.

Step 6: Review your SPSS output and answer each of
the following questions:

QUESTION	type answers below	Score (to be entered by instructor)
From the independent samples t-test output:
1. What is the mean CHNG_ENDUR for group 1?	________________	____ / 3 points
2. What is the CHNG_ ENDUR standard deviation for group 1?	________________	____ / 3 points
3. What is the mean CHNG_ENDUR for group 2?	________________	____ / 3 points
4. What is the CHNG_ ENDUR standard deviation for group 2?	________________	____ / 3 points
5. What is the value of the t statistic (equal variances assumed)?	________________	____ / 3 points
6. What is the probability that the obtained t statistic was simply due to chance as opposed to actual exercise type differences [see “Sig (two-tailed)” on output]?	________________	____ / 3 points
7. Are the results statistically significant at alpha = 0.05 (yes or no)?	________________	____ / 3 points
8. Based on the results, do you reject or fail to reject the null hypothesis?	________________	____ / 3 points
From the ANOVA output:
9. What is the mean CHNG_ENDUR for males?	________________	____ / 3 points
10. What is the CHNG_ENDUR standard deviation for males?	________________	____ / 3 points
11. What is the mean CHNG_ENDUR for females?	________________	____ / 3 points
12. What is the CHNG_ENDUR standard deviation for females?	________________	____ / 3 points
13. What is the calculated F-value?	________________	____ / 3 points
14. What is the probability (noted as “Sig” on output) that the obtained F-value was simply due to chance as opposed to actual gender differences?	________________	____ / 3 points

Step 7: Paste the SPSS Codebook output below.

Step 8: Paste the independent samples t-test
output below.

Step 9: Paste the ANOVA output below.

Section below
(scoring) is to be completed by Instructor

Scoring Rubric for Week 2
Assignment 1—Hands on SPSS(60
points)

Questions

14 questions (worth 3 points each) ____ / 42 points possible

SPSS Output

Three SPSS outputs (6 points each) ____ / 18 points possible

Initial
Score (60 possible points):

Timeliness
Factor(late points deducted):

Total Score
(60 possible points):

Instructor comments: