Question: in a study of work pattern in one population, the mean family time devoted to a child care is 23.08 hours with a standard deviation

in a study of work pattern in one population, the mean family time devoted to a child care is 23.08 hours with a standard deviation of 15.58hours. If 55 subjects are chosen at random from this population . find the probability that the mean of this sample group is between 23.08 and 25 hours

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