A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper took a SRS of  n=1400 registered voters and found that 720 would vote for the Republican candidate. Let (p) represent the proportion of registered voters in the state who would vote for the Republican candidate. We test  H0: p = .50 Ha: p > .50 (a) What is the z-statistic for this test?   (b) What is the P-value of the test?

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A: Given data: Significance level= 0.01,  and 0.05 p =.69 x = 365 n = 500

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A:

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A:

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A: (a)

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.