Find probability that sample mean of weight lie in range
The weights of a population of workers have mean 167 and standard deviation 27. If a sample of 36 workers is chosen, what is the probability that the sample mean of their weights is between 163 and 170?
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Assuming that the population standard deviation is known to be 1.6 cm, use a 0.05 significance level to test the claim that the mean circumference of all pumpkins is equal to 39.9 cm.
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If a sample of 36 workers is chosen, what is the probability that the sample mean of their weights is between 163 and 170?
The density function of a continuous random variable X, the total number of hours, in units of 100 hours, that a family runs a vacuum cleaner over a period of one year is described by the following probability density function:
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An old, low quality, but free and interesting documentary: Zimbardo- Stanford Prison Experiment Documentary.