A project management consultant estimated that if a particular project was completed t years after completion, N thousand persons would benefit firectly from the project, where         N(t)=t3/3-4.5t2+16t                       0≤t≤10   for waht value of t will the lagest number of people receive direct benefits

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Q: What degrees of freedom would younormally expect a t test to have when N1 = 40 and N2 = 55?

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