A medical researcher says that less than 83% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 300 adults in that country, 81% think that healthy children should be required to be vaccinated. At a=.10, there is enough evidence to support the researchers claim? Complete parts b through e.

A. Identify the claim and state the Ho and Ha.

Identify the claim in this scenario. Select the correct choice and fill in the blank.

1. Less than ___% of adults in the country think that healthy children should be required to be vaccinated.

2. ___% of adults in the country think that healthy children should be required to be vaccinated.

3. More than ___% of adults in the country think that healthy children should be required to be vaccinated.

4. The percentage of adults in the country who think that healthy children should be required to be vaccinated is not ___%.

B. Find the critical value(s) and identify the rejection region(s).

C. Find the standardized test statistic z.

D. Decide whether to reject or fail to reject the null hypothesis.

E. Interpret the decision in the context of the original claim.