7. Suppose it is claimed that amongst the population of human adults, the number of hours spent sleeping per day is normally distributed with a mean of u = 7 and variance of o² = 1.1 Further suppose that we wish to study the mean of the population by taking a random sample of n = 62 adults. 2005 9. Again following on from the previous question, what is the probability that when we take a random sample of n = 62 adults, the sample mean would be either greater than 7.133 or less than 6.867?

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