While there is much debate, several health authorities have concluded that a vitamin D level of 30 is adequate for maintaining one's health. Suppose this is the mean vitamin D level for adults in the United States. What is the probability that random sample of 50 adults from the United States will have a mean vitamin D level below 25? Suppose the standard deviation is 6.   a. 0.0000   b. Cannot be solved since the sampling distribution cannot be established.   c. 0.4207   d. None of these   e. 0.3812

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Q: 2) Consumer Reports has done studies that show that the life span of television sets is normally…

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Q: While there is much debate, several health authorities have concluded that a vitamin D level of 30…

A:

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A:

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Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

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A: Given that  Mean=80 , Standard deviation=10 Find  P(X<=65)