Question

mean ratings for patients after 21 days
measure
global improvement
symptom severity reduction
quality of life improvement
mean rating for participants aware of taking a placebo
5.0
92.00
11.4
mean rating for participants in the control group
3.9
46.00
6.4
to test whether a medication is effective, scientists compare outcomes for patients taking it and patients taking a placebo (a medically inactive substance). patients normally arent told theyre receiving a placebo, but a research team conducted a study to see if there might be a medical benefit to telling them. the team used various measures to evaluate participants, with higher ratings indicating greater well - being in each measure.
10 mark for review
which choice most effectively uses data from the table to complete the statement?
a ranged from 5.0 to 92.00, indicating that well - being varied widely from participant to participant.
b were lower for two measures, with the rating for only one measure indicating greater well - being for these participants.
c ranged from 3.9 to 46.00, with no rating indicating greater well - being in any measure for these participants.
d were higher for all three measures, indicating greater overall well - being for these participants.

Explanation:

Looking at the table, for Global Improvement, Symptom Severity Reduction, and Quality of Life Improvement, the mean ratings for participants aware of taking a placebo are higher than those in the control group. Higher ratings indicate greater well - being. So, the placebo - aware participants had higher ratings for all three measures.

Answer:

D. were higher for all three measures, indicating greater overall well - being for these participants.