Though not a favorite example, this problem is based on the sample demonstration problem used in the book. The dependent variable is the number of times a student attends the statistics lab during one academic term. The independent variable is the attractiveness of the lab instructor, with 1 for unattractive (ouch), 2 for slightly attractive, 3 for moderately attractive, and 4 for very attractive. The researcher is exploring whether the attractiveness of the instructor influences student attendance at the statistics lab. Students were randomly assigned to different groups at the start of the term. There were 11 students in each group, and students could attend a maximum of 31 lab sessions.
Though not a favorite example, this problem is based on the sample demonstration problem used in the book. The dependent variable is the number of times a student attends the statistics lab during one academic term. The independent variable is the attractiveness of the lab instructor, with 1 for unattractive (ouch), 2 for slightly attractive, 3 for moderately attractive, and 4 for very attractive. The researcher is exploring whether the attractiveness of the instructor influences student attendance at the statistics lab. Students were randomly assigned to different groups at the start of the term. There were 11 students in each group, and students could attend a maximum of 31 lab sessions.
| Group | Number of Stats Lab Attended |
|---|---|
| 1 | 20 |
| 1 | 20 |
| 1 | 9 |
| 1 | 21 |
| 1 | 7 |
| 1 | 25 |
| 1 | 18 |
| 1 | 9 |
| 1 | 22 |
| 1 | 25 |
| 1 | 7 |
| 2 | 31 |
| 2 | 25 |
| 2 | 27 |
| 2 | 20 |
| 2 | 22 |
| 2 | 23 |
| 2 | 19 |
| 2 | 8 |
| 2 | 29 |
| 2 | 21 |
| 2 | 27 |
| 3 | 15 |
| 3 | 15 |
| 3 | 30 |
| 3 | 28 |
| 3 | 22 |
| 3 | 22 |
| 3 | 28 |
| 3 | 26 |
| 3 | 16 |
| 3 | 25 |
| 3 | 30 |
| 4 | 30 |
| 4 | 28 |
| 4 | 26 |
| 4 | 12 |
| 4 | 29 |
| 4 | 21 |
| 4 | 27 |
| 4 | 20 |
| 4 | 31 |
| 4 | 26 |
| 4 | 23 |
Use SPSS to conduct a one-factor ANOVA to determine if the group means are equal using α=0.02α=0.02. Complete the ANOVA summary table. Report the P-value accurate to 4 decimal places; use 3 decimal places for all other values.
| Source | SS | df | MS | F | sig. |
|---|---|---|---|---|---|
| between | Incorrect | Incorrect | Incorrect | Incorrect | Incorrect |
| within | Incorrect | ||||
| TOTAL |
Based on this information, what is the decision regarding the null hypothesis, and what is the final conclusion for the researcher?
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