A telephone company representative estimates that 20% of its customers have call-waiting service. To test this hypothesis, she selected a sample of 100 customers and found that 37% had call waiting. At 5% significance level, is there enough evidence to reject the claim? To give your conclusion,
a. Use the traditional method.
b. Use the p-value method.
c. Use the confidence interval method.
Please fix the following input errors:
