The vitamin content of a particular brand of vitamin supplement pills is normally distributed with mean mg and standard deviation mg. What is the probability (approximately) that a randomly selected pill contains at least mg of Vitamin C?
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The vitamin content of a particular brand of vitamin supplement pills is normally distributed with mean 490 mg and standard deviation 12 mg. What is the probability (approximately) that a randomly selected pill contains at least 500 mg of Vitamin C? (A) 0.8 (B) 0.2 (C) 0.025 (D) 0.55
Random variables and standard distributions has come up 173 times in 7 exams since 2005.
This question is on The normal distribution, part of Random variables and standard distributions in Statistics.
The bell curve: standardising, tail probabilities and approximations.
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Question from the DSE 2016 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.