1 In a research report from an experiment, the term astatistically significant difference is used to indicate____________ .
- A. that the there is a very low probability (i.e., 5% or less)the difference obtained in the study could happen by chance
- B. that the there is a high probability (i.e., 95% or more) thedifference obtained in the study could happen by chance
- C. that the difference is large
- D. b & c
2 determining a person’s height would involve measurement ona(n) __________ scale.
- A. ratio
- B. interval
- C. ordinal
- D. nominal
3 A research report describing the results of arepeated-measures study states, "The data showed a significantdifference between treatments, t(22) = 4.91, p < 0.05” From thisreport you can conclude that the outcome of the hypothesis test was______________.
- A. to reject the null hypothesis and that indicates that thetreatment had no effect.
- B. It is impossible to determine whether or not the nullhypothesis was rejected from the information given.
- C. to fail to reject the null hypothesis and that indicatesthat the treatment had no effect.
- D. to fail to reject the null hypothesis and that indicatesthat the treatment did produce a significant effect on participants‘behavior.
- E. to reject the null hypothesis and that indicates that thetreatment did produce a significant effect on participants’behavior.
4 If the researchers of the experiment described in question 11committed Type I error in hypothesis testing that would mean______. .
- A. they falsely concluded that having breakfast has asignificant effect on math test scores.
- B. they correctly concluded that having breakfast has asignificant effect on math test scores.
- C. they falsely concluded that having breakfast has no effecton math test scores.
- D. None of the above.
5 If the researchers of the experiment described in question 11committed Type I error in hypothesis testing that would mean______. .
- A. they falsely concluded that having breakfast has asignificant effect on math test scores.
- B. they correctly concluded that having breakfast has asignificant effect on math test scores.
- C. they falsely concluded that having breakfast has no effecton math test scores.
- D. None of the above.
6 A sample has the mean of M = 50 and the standard deviation ofs = 9. If you randomly select a single score from this sample, onthe average, how close would it be to the sample mean? (Hint: whatis measured by standard deviation?)
