Question

A poll of 1,068 adult Americans reveals that 48% of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, test the claim that at least half of all voters prefer the Democrat.

a. Identify the null and alternative hypotheses.
b. Find the test statistic and P-value.
c. State the conclusion about the null hypothesis.
d. State the final conclusion that addresses the original claim.

Answer 1

Explanation:

H0 = .5 prefer Democratic candidate

Ha > .5 prefer Democratic candidate

p = .48

z = -1.285179129

0.9006 >= .05 thus we "FAIL TO REJECT THE NULL HYPOTHESES"