The Pittsburgh Post Gazette (Feb. 27, 2002) reported on a study conducted by Scripps Howard News Service and Ohio University on the proportions of left handed people by gender. Specifically, the study revealed that 15% of males in the study were left handed while only 9% of the females were left handed. The 95% confidence interval estimate for the difference in the proportions of left-handed males minus left-handed females is calculated to be (-4% … 16%). Which of the following statements is the correct interpretation for this interval of numbers? One can expect between 4% to 16% more left-handed males. The data do not support that there are more males that are left-handed. One can expect at least 4% more left-handed males. We are 95% confident that more males are left-handed.
The Pittsburgh Post Gazette (Feb. 27, 2002) reported on a study conducted by Scripps Howard News Service and Ohio University on the proportions of left handed people by gender. Specifically, the study revealed that 15% of males in the study were left handed while only 9% of the females were left handed. The 95% confidence
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One can expect between 4% to 16% more left-handed males. |
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The data do not support that there are more males that are left-handed. |
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One can expect at least 4% more left-handed males. |
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We are 95% confident that more males are left-handed. |
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