Variables

Previous exam to used in studies 1. a) Heteroskedasticity is a statistical term that refers to differing variance that is if the sequence of random variables has different variances. incidental correlation or Multicollinearity is a situation where by variables atomic number 18 so highly correlated with each other that it is wearing to come up with reliable estimates of their individual regression coefficients. This excoriate render the inferences of multiple regression equation unreliable because they cut down p-values misleading and the regression coefficients; confidence intervals become very wide and may vary dramatically with addition or elimination of just one. They inflate the variables of parameter estimates that lead to lack of statistical significance. They are detected by examining tolerance which is a beat of collinearly and variance inflation factor (VIF) which measures impact of collinearly. Regression outline in such situation can be change for m by increasing sample size of your study and by centering variables. 2. a) Expected demand = (8000x0.15) + (9000x0.30) + (12000x0.30) + (14000x0.15) + (16000x0.10) = 11200 units E (profit) = 11200(250-180) 700000 = Sh.

84000 Standard parenthesis = Square root of variance = 2131 units ! P (profit = 50000) z = boodle E (profit) / standard deviation; z is the standard normal diffusion z = (50000 84000)/ 2131x70 = -0.23 Using the z table, P (profit = 50000) = 0.5 0.0910 = 0.42...If you essential to become a full essay, order it on our website: OrderEssay.net

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