Refer to Exercise 15.45. Random samples from Denmark, Ireland, the Netherlands, and Sweden were drawn. Is the sufficient evidence to infer that there are differences in household types between the four countries?

In exercise 15.45

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 the 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?