Researchers wish to test the effectiveness of a drug designed to treat depression.Seven clinically depressed patients are given a standardized depression test before taking the drug and are evaluated 4 weeks later using the same test.It is known that the scores from this particular test are not normally distributed.The scores are shown here.
Use a sign test to conclude whether the drug can be associated with a median decrease in depression level.Choose the correct p-value and conclusion.(Use α = 0.05.)
A) p = 0.5000; there appears to be no median decrease in depression.
B) p = 0.8125; there appears to be no median decrease in depression.
C) p = 0.1875; there appears to be no median decrease in depression.
D) p = 0.1875; there appears to be a median decrease in depression.

Question

Researchers wish to test the effectiveness of a drug designed to treat depression.Seven clinically depressed patients are given a standardized depression test before taking the drug and are evaluated 4 weeks later using the same test.It is known that the scores from this particular test are not normally distributed.The scores are shown here. ​  ​
Use a sign test to conclude whether the drug can be associated with a median decrease in depression level.Choose the correct p-value and conclusion.(Use α = 0.05.)
A) p = 0.5000; there appears to be no median decrease in depression. 
B) p = 0.8125; there appears to be no median decrease in depression. 
C) p = 0.1875; there appears to be no median decrease in depression. 
D) p = 0.1875; there appears to be a median decrease in depression.

Quizplus · Accepted Answer

The Answer of Researchers wish to test the effectiveness of a drug designed to treat depression.Seven clinically depressed patients are given a standardized depression test before taking the drug and are evaluated 4 weeks later using the same test.It is known that the scores from this particular test are not normally distributed.The scores are shown here. ​  ​
Use a sign test to conclude whether the drug can be associated with a median decrease in depression level.Choose the correct p-value and conclusion.(Use α = 0.05.)
A) p = 0.5000; there appears to be no median decrease in depression. 
B) p = 0.8125; there appears to be no median decrease in depression. 
C) p = 0.1875; there appears to be no median decrease in depression. 
D) p = 0.1875; there appears to be a median decrease in depression.

Researchers Wish to Test the Effectiveness of a Drug Designed