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1) The time that students spend studying per week is normally distributed with a mean of 8.4 hous and stadard deviation of 2.7 hours. Find te probability that the mean time spent studying pere week for a random fo 45 students would be less than 8 hours .
2) A survey of corporations showed that 64% of them offer retirement plna to theri employees. In a sample of 50 sycg corporations that offer retimrent plans to theri employees, find the probability that the sample proportion will be greater than 71%.
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1. The time that university students spend studying per week has a distribution that is skewed to
the right with a mean of 8.4 hours and a standard deviation ...
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