NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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Ace your North American Pharmacist Licensure Examination (NAPLEX) with our comprehensive practice test. Features include interactive flashcards, multiple-choice questions, with detailed hints and explanations. Fast-track your pharmacy career today!

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What does a narrow confidence interval (CI) imply?

Low precision
High precision
High statistical significance
Low statistical significance

The correct answer is: High precision

A narrow confidence interval (CI) implies high precision. This means that the sample data is clustered closely around the true population parameter. A narrower CI indicates that there is a high level of confidence that the true value of the parameter lies within a small range of values. Therefore, option B is the correct answer. Options A, C, and D are incorrect: - Option A, low precision, is incorrect because a narrow CI actually indicates high precision, not low precision. - Option C, high statistical significance, is incorrect because the width of the confidence interval does not directly indicate statistical significance. - Option D, low statistical significance, is incorrect as the precision of a CI does not directly correlate with statistical significance.