In a certain country, the average age is 31 years old and the standard deviation is 4 years. If we select a simple random sample of 100 people from this country, what is the probability that the average age of our sample is at least 32? 0.599 0.994 0.401 0.006
Added by Kyle M.
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We know the population mean ($\mu$) is 31 and the population standard deviation ($\sigma$) is 4. Show more…
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'In a certain country; the average age is 31 years old and the standard deviation is 4 years. If we select a simple random sample of 100 people from this country; what is the probability that the average age of our sample is at least 322 0.401 0.006 0.599 0.994'
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The median age of residents of the United States is 31 years. If a survey of 100 randomly selected U.S. residents is to be taken, use the normal approximation to the binomial distribution to approximate the probability that at least 62 will be under 31 years of age. (Round your answer to four decimal places.)
Sanchit J.
The median age of residents of the United States is 31 years. If a survey of 100 randomly selected United States residents is to be taken, what is the approximate probability that at least 60 will be under 31 years of age?
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