A medical researcher says that 80% of U.S. adults think that healthy children should be required to be vaccinated. In a random sample of 200 U.S. adults, 150 think that healthy children should be required to be vaccinated. At 5% level of significance, is there enough evidence to prove that the true proportion is less than the researcher's claim?

What is the Null hypothesis (H0); Alternate hypothesis (H1); and the direction of the test?

A) p > 0.8, p< 0.8, right tailed test.

B) p<= 0.8, p<0.8, right tailed test.

C) p=0.8, p<>0.8, two tailed test.

D) p= 0.8, p< 0.8, left tailed test

Which distribution is used in this case?

A) z

B) t

C) Does not apply

D) Binomial

What is the critical value?

A) -1.96

B) 1.96

C) -1.645

D) 1.645

What is the Test Statistic Value?

A) 1.63

B) 0.71

C) -1.77

D) Doesn't apply

What is the P-value?

A) 0.0516

B) 0.9484

C) 0.9616

D) 0.0384

What is the conclusion of the test?

A) Fail to reject Null Hypothesis.

B) Test is Insignificant

C) Fail to reject Alternative Hypothesis.

D) Test is Significant