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Questions A-C a) In the 2012 Presidential Election Barack Obama received 51.1% of all votes cast....

Questions A-C

a) In the 2012 Presidential Election Barack Obama received 51.1% of all votes cast. A polling organization polls 2500 selected randomly selected voters the week prior to the 2016 Republican convention to determine if the percentage of votes 2016 Republican nominee Donald Trump will receive less than Obama's 2012 percentage.

Write out the hypotheses using proper notation.

b) For b (i) draw the normal density curve, (ii) Place the appropriate value or values on the horizontal number line, (iii) Shade the appropriate region for the p-value, and (iv) Find the p-value.

Ho: p ≤ 0.25 vs. Ha: p > 0.25 with Test Statistic z = 1.57

c) You conduct a hypothesis test for the population proportion. After you calculate the z test statistic, you find that your p-value = 0.007. Using alpha (α) = 0.01 level of significance, what is your decision regarding the null hypothesis? Choose from the following.

- Reject the null hypothesis and reject the alternative hypothesis

- Accept the null hypothesis

- Do not reject the null hypothesis

- Reject the null hypothesis and accept the alternative hypothesis

math   Statistics-And-Probability   
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