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)

A pollster claims that at least half of all students voted in the last presidential election. How would you respond?

At the 95% confidence level, we cannot make any determination about the percentage of college students who voted in the last election.

Explanation / Answer

Solution:
Its answer is D. i.e. we are 95% confident that less than 50% of all college students voted in the last presiential election because confidence interval is (0.30791, 0.44209). 0.5 is not in b/w confidence interval so we can say that we are confident that less tat 50% of the college students voted in the last presidential elections. So its answer is D.

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