Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_vufsw-inferentialstatistics-0131-en_vufsw-inferentialstatistics-0131-en
   name	vufsw-inferentialstatistics-0131-en
   section	inferential statistics
   type	schoice
   solution	FALSE, FALSE, FALSE, FALSE, TRUE
   Type	conceptual
   Program	NA
   Language	English
   Level	statistical reasoning

   Question

   VU medical school is conducting a study on the effectiveness of a drug that should lead to lower blood pressure. For this purpose, the blood pressure before the use of the drug is compared with the blood pressure after the drug has been used for three weeks by the subjects studied. The one-sided hypothesis was tested with a significance level of 5% (α = .05).

   Another researcher replicated (repeated) this study, with a new sample of 52 subjects. He comes to a different conclusion about the drug’s effectiveness than the previous study.

   How can we explain such a contradictory result?

   
   
   1. FALSE: The second researcher uses a different significance level.
   2. FALSE: The second researcher chooses a different critical t-value.
   3. FALSE: The second researcher observes different difference scores in their sample.
   4. FALSE: The second researcher uses a larger sample (N=52).
   5. TRUE: All of the above answers provide a possible explanation for such a contradictory outcome.
   
   
   1. False
   2. False
   3. False
   4. False
   5. True