To determine the actual side effects, pharmaceutical companies often conduct studies that compare the side effects of their drug versus the side effects of a placebo. One such study examined the side effects of a new cold remedy. A random sample, of 250 people was given the cold remedy and another 250 were given a placebo that looked like a cold remedy

To determine the actual side effects, pharmaceutical companies often conduct studies that compare the side effects of their drug versus the side effects of a placebo. One such study examined the side effects of a new cold remedy. A random sample, of 250 people was given the cold remedy and another 250 were given a placebo that looked like a cold remedy

These responses were recorded as

1= headache

2 = drowsiness

3= stomach upset

4 = no side effect

Do these data provide enough evidence to infer that the reported side effects differ between the cold remedy and the placebo?