The project hoped to show that right-handed people find right-hand threads easie
ID: 2957772 • Letter: T
Question
The project hoped to show that right-handed people find right-hand threads easier to use. Let µ be the mean difference in the time needed to do the action (right minus left). State the hypotheses you should use to reach a conclusion.A. H0: µ = 0
Ha: µ < 0
B. H0: µ = 0
Ha: µ > 0
C. H0: µ = 0
Ha: µ ? 0
D. H0: µ ? 0
Ha: µ = 0
What is your conclusion?
A. Right-handed people find right-hand threads easier to use (P < 0.01).
B. Right-handed people find right-hand threads easier to use (0.01 < P < 0.05).
C. Right-handed people don't find right-hand threads easier to use (0.05 < P < 0.1).
D. Right-handed people don't find right-hand threads easier to use (P > 0.1).
What is the double-blind method and why should it be used in this experiment?
A. The subjects did not know who was getting ginkgo extract.
This prevents expectations or prejudices from affecting the evaluation of the effectiveness of the treatment.
B. The researchers who worked with the subjects did not know which of the subjects was getting ginkgo extract.
This prevents expectations from affecting the evaluation of the effectiveness of the treatment.
C. The researchers and subjects did not meet each other, to prevent non relevant considerations in the evaluation of the effectiveness of the treatment.
D. Neither the subjects nor the researchers who worked with them knew who was getting ginkgo extract.
This prevents expectations or prejudices from affecting the evaluation of the effectiveness of the treatment.
Explanation / Answer
We need to test,
H0:=0
versus
Ha:<0
Conclusion:
A. Right-handed people find right-hand threads easier to use (P < 0.01).
A. The subjects did not know who was getting ginkgo extract.
This prevents expectations or prejudices from affecting the evaluation of the effectiveness of the treatment.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.