In a recent poll, people were asked whether they supported an increase in the sales tax. The following display from a TI-84 Plus calculator presents the results of a hypothesis test regarding the proportion of individuals who said they supported an increase in the sales tax.

a. What are the null and alternate hypotheses?

b. What is the value of the sample proportion ̂p?

c. Can H0 be rejected at the 0.05 level? State a conclusion.

d. Someone wants to use these data to test H0: p = 0.25 versus H1: p ≠ 0.25. Find the test statistic z and use the method of this section to find the P-value. Do you reject H0 at the α = 0.05 level? State a conclusion.

Transcribed Image Text:

1-PropZTest Prop