Sample standard deviation
A sample 9 MBA student taking OTM course in spring of 2013, describes an average income of $95,000 with the sample standard deviation of 9,000. Find the 90% confidence interval of the population mean income of MBA student.
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R is the relation of positive integers N that meet R={(x,y) | x + 3y = 12}. Represent R as a set of ordered pairs. Represent R in set form (domain and range). Compute R^-1, R%u0305 and R o R (represent the composition in matrix form).
A sample of 64 "AAA" Alkaline batteries has mean life of 7 months. The standard deviation of the population is known to be 2 months. Find the 95% confidence interval of the popualtion mean life of "AAA" Alkaline batteries?
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A sample of 36 "AA" Alkaline batteries has mean life of 6 months. The standard deviation of the population is known to be 3 months. Find the 95% confidence interval of the popualtion mean life of "AA" Alkaline batteries.
A sample 25 MBA student taking OTM course in spring of 2013, describes an average income of $85,000 with the sample standard deviation of 5,000. Determine the 95% confidence interval of the population mean income of MBA student.
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Find an ODE y'= f(x,y) for which the domain is the whole xy-plane and such that ny straight line passing through point (1,1) belongs to its isocline. Solve the equations.
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