We are interested in learning about the proportion of students who voted in the

Question

We are interested in learning about the proportion of students who voted in the last presidential election. A statistix printout is shown below:

Hypothesis Test - One Proportion

Sample Size 200
Successes 75
Proportion 0.37500

Difference -0.12500
Standard Error 0.03423
Z (uncorrected) - 3.54 P 0.0004

Method 95% Confidence Interval
Simple Asymptotic (0.30791, 0.44209)

Unfortunately, the study should have tested to determine if less than 50% of all college students voted in the last election. Use your knowledge of p-values to determine the p-value that should be used to conduct this test.

Explanation / Answer

Here the z-statistic is -3.536. So the P-value is P[Z<-3.536] which is 0.0002031173. Here Z is N(0,1).

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