Acompany is testing a new weight-loss supplement. for the study, the company enrolled 189 obese or overweight middle-aged people who agreed to take a weight-loss supplement for eight weeks. half took the supplements and half took a placebo. a representative portion of their results is shown in the table below. what conclusions can you draw from this portion of the results?
subject #
group
baseline weight
8 wk weight loss/gain
26
placebo
192
+2.7
32
supplement
151
-3.2
35
supplement
204
-6.6
54
supplement
216
-4.9
85
placebo
185
-2.4
116
supplement
197
+3.4
133
placebo
290
+6.8
147
supplement
235
-9.0
153
placebo
188
+5.8
167
supplement
233
-5.3
188
supplement
198
-7.3
the supplement seems to be effective, but more trials are necessary.
the supplement is not effective because some of the people gained weight.
the supplement is no more effective for causing weight loss than the placebo.
the supplement produced results that are identical to the placebo.
Answers: 2
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