Trials in an experiment with a polygraph include

96

results that include

23

cases of wrong results and

73

cases of correct results. Use a

0.05

significance level to test the claim that such polygraph results are correct less than

80

%

of the time. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Use the normal distribution as an approximation of the binomial distribution.

Let p be the population proportion of correct polygraph results. Identify the null and alternative hypotheses. Choose the correct answer below. identify the test statistic is z and The P-value is

A.

H0:

pequals

0.80H1:

pnot equals

0.80

B.

H0:

pequals

0.80H1:

pgreater than

0.80

C.

H0:

pequals

0.80H1:

pless than

0.80

D.

H0:

pequals

0.20H1:

pnot equals

0.20

E.

H0:

pequals

0.20H1:

pless than

0.20

F.

H0:

pequals

0.20H1:

pgreater than

0.20