Question

question 10

measure | mean rating for participants aware of taking a placebo | mean rating for participants in the control group
--- | --- | ---
global improvement | 5.0 | 3.9
symptom severity reduction | 92.00 | 46.00
quality of life improvement | 11.4 | 5.4

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 aren’t told they’re 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. compared to the mean ratings after 21 days for participants in the control group, the mean ratings for participants who were aware of taking a placebo ______

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.

Explanation:

To solve this, we analyze each measure's mean ratings between the two groups:

For Global Improvement:

Mean for placebo - aware: \( 5.0 \), Control group: \( 3.9 \). \( 5.0 > 3.9 \), so placebo - aware is higher.

For Symptom Severity Reduction:

Mean for placebo - aware: \( 92.00 \), Control group: \( 46.00 \). \( 92.00 > 46.00 \), so placebo - aware is higher.

For Quality of Life Improvement:

Mean for placebo - aware: \( 11.4 \), Control group: \( 5.4 \). \( 11.4 > 5.4 \), so placebo - aware is higher.

From this, we see that for every measure, the mean rating of participants aware of taking a placebo is higher than that of the control group. So the statement should reflect that the mean ratings for placebo - aware participants were higher (across all measures, showing a consistent positive effect of being aware of taking a placebo on well - being).

(Note: Since the options are partially visible, but from the data analysis, the correct completion would involve stating that the mean ratings for placebo - aware participants were higher than those of the control group for all measures, indicating a greater well - being when aware of taking a placebo.)

If we assume the options are about comparing the two groups' means, the correct idea is that the placebo - aware group had higher mean ratings (showing better well - being) across all measures. For example, if an option says something like "were higher for all measures, indicating greater well - being when aware of taking a placebo", that would be correct.

(As the full options are not provided, but based on the data, the key is that placebo - aware group has higher means for all three measures, so the statement should highlight this consistent higher rating for placebo - aware participants.)

Answer:

To solve this, we analyze each measure's mean ratings between the two groups:

For Global Improvement:

Mean for placebo - aware: \( 5.0 \), Control group: \( 3.9 \). \( 5.0 > 3.9 \), so placebo - aware is higher.

For Symptom Severity Reduction:

Mean for placebo - aware: \( 92.00 \), Control group: \( 46.00 \). \( 92.00 > 46.00 \), so placebo - aware is higher.

For Quality of Life Improvement:

Mean for placebo - aware: \( 11.4 \), Control group: \( 5.4 \). \( 11.4 > 5.4 \), so placebo - aware is higher.

From this, we see that for every measure, the mean rating of participants aware of taking a placebo is higher than that of the control group. So the statement should reflect that the mean ratings for placebo - aware participants were higher (across all measures, showing a consistent positive effect of being aware of taking a placebo on well - being).

(Note: Since the options are partially visible, but from the data analysis, the correct completion would involve stating that the mean ratings for placebo - aware participants were higher than those of the control group for all measures, indicating a greater well - being when aware of taking a placebo.)

If we assume the options are about comparing the two groups' means, the correct idea is that the placebo - aware group had higher mean ratings (showing better well - being) across all measures. For example, if an option says something like "were higher for all measures, indicating greater well - being when aware of taking a placebo", that would be correct.

(As the full options are not provided, but based on the data, the key is that placebo - aware group has higher means for all three measures, so the statement should highlight this consistent higher rating for placebo - aware participants.)