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Mathematics, 17.09.2019 06:00 23gordns
5. the inland revenue department claims it takes an average of 6 hours to complete a tax form. assuming the time to complete the form is normally distributed with a standard deviation of 45 minutes:
i. what percent of people would you expect to complete the form in more than 5 hours?
ii. if a sample of 20 taxpayers are selected, what is the probability that the sample mean is less than 6.5 hours?
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5. the inland revenue department claims it takes an average of 6 hours to complete a tax form. assum...
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