According to an exit poll of the 2010 California gubernatorial election (see Chapter 7), 53.1% of the 3889 voters sampled reported voting for Brown. Is this enough evidence to predict who won? Test that the population proportion who voted for Brown was 0.50 against the alternative that it differed from 0.50.
Answer by:
a. Identifying the variable and parameter of interest and defining notation.
b. Stating hypotheses and checking assumptions for a large-sample test.

c. Reporting the test statistic and P-value, interpreting the latter.
d. Explaining how to make a decision for the significance level of 0.05. Is the proportion voting for Brown significantly different from 50%?