Suppose you are conducting a study to determine if women are better drivers than men.You send your survey to over 1000 students on your campus and 5 students respond that women are better drivers and 4 students respond that women are not better drivers.Which of the methods below should you use to build a confidence interval?

A) Large-sample method
B) Plus four method
C) Multi-sample method
D) Two-sample method

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Aliyah White · Accepted Answer

Final Answer : B, Explanation :  The Plus four method is appropriate when the sample size is small, in this case only 9 students responded to the survey. The Plus four method adds 2 to the number of successes and 2 to the number of failures to account for the uncertainty in the data, resulting in a sample of 11 with 7 successes and 4 failures. This allows for a more accurate estimation of the confidence interval.

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