Question

9.1.4

In a large clinical​ trial,

397 comma 425

children were randomly assigned to two groups. The treatment group consisted of

199 comma 548

children given a vaccine for a certain​ disease, and

37

of those children developed the disease. The other

197 comma 877

children were given a​ placebo, and

133

of those children developed the disease. Consider the vaccine treatment group to be the first sample. Complete parts​ (a) through​ (d) below.

a. Assume that a

0.05

significance level will be used to test the claim that

p 1

less thanp 2

.

Which is​ better: A hypothesis test or a confidence​ interval?

▼

is better.

Click to select your answer(s) and then click Check Answer.

3

parts remaining

Answer 1

Solution: Which is better: A hypothesis test or a confidence interval?

Answer: A hypothesis test is better.

Explanation:

In the given, we are given:

  

  

The test statistic to compare the two proportions is:

Since we are given all the components of the test statistic, therefore, it would be better to use the hypothesis test.