HYPOTHESIS TESTING: AN EXAMPLE
Independent-Samples t Test – Example 2 (Self-Esteem)
You are a researcher who is interested in determining whether dressing professionally increases self-esteem. You asked one group of participants to dress casually and a different group of participants to dress professionally for 1 week. At the end of the week, participants completed a self-esteem evaluation. The scores are listed below in the tables.
Step 1. State your hypotheses.
a. Is it a one-tailed or two-tailed test?
b. Hypotheses in words:
HA:
H0:
c. Hypotheses in symbols:
HA:
H0:
Step 2. Set the significance level ( ( = .05 Determine tcrit. tcrit = _________
Step 3. Compute the appropriate statistical test.
|Professional Group | | | |
|(X1) |[pic] |X –[pic] |(X –[pic])2 |
|98 | | | |
|120 | | | |
|149 | | | |
|122 | | | |
|120 | | | |
| | | | |
| | | | |
SS1 = _________ SS2 = _________
|Casual Group | | | |
|(X2) |[pic] |X –[pic] |(X –[pic])2 |
|86 | | | |
|99 | | | |
|95 | | | |
|94 | | | |
|72 | | | |
|110 | | | |
| | | | |
Step 4. Make a decision. Determine whether the value of the test statistic is in the critical region. Draw a picture. Label tcrit and tobt.
Is tobt in the critical region? ___________
Should you reject or retain the H0? ___________
Step 5. Report the statistical results.
Step 6. Write a conclusion.
Step 7. Compute the estimated d.
Step 8. Compute r2 and write a conclusion.
-----------------------
[pic]
[pic]
[pic]
[pic]
[pic]
[pic]
[pic]
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- hypothesis testing for regression
- hypothesis testing for linear regression
- p value hypothesis testing calculator
- hypothesis testing p value calculator
- hypothesis testing examples
- real world hypothesis testing examples
- hypothesis testing in nursing example
- t test hypothesis testing example
- hypothesis testing examples and solutions
- hypothesis testing in daily life
- hypothesis testing questions and answers
- hypothesis testing statistics pdf