Suppose you want to know if different dosages of caffeine affectstudents’ performance on a test. We randomly sampled 15 collegestudents and randomly assigned them to three conditions.
- Group 1: Very large dose of caffeine
- Group 2: Moderate dose of caffeine
- Group 3: Placebo (no caffeine)
The table below displays these 15 students’ scores.
Group1 | Group 2 | Group 3 |
15 | 26 | 10 |
16 | 25 | 9 |
14 | 23 | 9 |
13 | 20 | 6 |
12 | 21 | 6 |
- Calculate SSB, SSW, SST, MSB, MSW, and F observed value. Fillout the blanks of this table.
| X | Y | Suppose you want to know if different dosages of caffeine affectstudents’ performance on a test. We randomly sampled 15 collegestudents and randomly assigned them to three conditions. - Group 1: Very large dose of caffeine
- Group 2: Moderate dose of caffeine
- Group 3: Placebo (no caffeine)
The table below displays these 15 students’ scores. Group1 | Group 2 | Group 3 | 15 | 26 | 10 | 16 | 25 | 9 | 14 | 23 | 9 | 13 | 20 | 6 | 12 | 21 | 6 |
- Calculate SSB, SSW, SST, MSB, MSW, and F observed value. Fillout the blanks of this table.
| X | Y | | | | | | | 1 | 15 | | | | | | | 1 | 16 | | | | | | | 1 | 14 | | | | | | | 1 | 13 | | | | | | | 1 | 12 | | | | | | | 2 | 26 | | | | | | | 2 | 25 | | | | | | | 2 | 23 | | | | | | | 2 | 20 | | | | | | | 2 | 21 | | | | | | | 3 | 10 | | | | | | | 3 | 9 | | | | | | | 3 | 9 | | | | | | | 3 | 6 | | | | | | | 3 | 6 | | | | | | SUM: | | | | | | | |
SSB=Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â | dfB= | MSB = | SSW=Â Â Â Â Â | dfW= | MSW = | SST =Â Â | | Fobs= |
2. Fill out the blanks of the following ANOVA table. Source | SS | df | MS | F | Â Â Between Groups | | | | | Â Â Within Groups | | | | | Â Â Â Â Total | | | | |
3. Perform the hypothesis testing to see if there aredifferences in test scores among the three groups. 4. Perform post-hoc comparisons. Find which groups aresignificantly different in test scores. 5. Enter the data in EXCEL. Analyze the data and attach theoutput. Confirm your results with the EXCEL output. Submit theoutput. | | | | |
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