11 May Design IssuesThis is a repeated-measures design because each participant performed the task after
Design Issues
This is a repeated-measures design because each participant performed the task after each dosage.
Descriptions of Variables
| Variable | Description |
| d0 | Number of correct responses after taking a placebo |
| d15 | Number of correct responses after taking .15 mg/kg of the drug |
| d30 | Number of correct responses after taking .30 mg/kg of the drug |
| d60 | Number of correct responses after taking .60 mg/kg of the drug |
The link to the ADHD case study http://onlinestatbook.com/2/case_studies/adhd.html
69. A researcher wants to know if the mean times (in minutes) that people watch their favorite news station are the same. Suppose that Table 13.24 shows the results of a study.
Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05.
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