'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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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
Sri K.
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.
To estimate the mean age for a population of the employees of a large company, a simple random sample of 49 employees is selected. What is the probability that the sample mean age of the employees will be greater than the population mean age ÎĽ by 2 years or more? Assume the population standard deviation is 10 years.
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