A random variable Z that is normally distributed with mean μ = 0 and standard deviation σ = 1 is said to have the ________ ________ ________.
Step 1 of 5) A random variable Z that is normally distributed with mean μ = 0 and standard deviation σ = 1 is said to have the. Certainly, one variable that might help to explain lemonade sales is the outside temperature. Another variable that might help explain lemonade sales is air-conditioning bills. If the researcher includes both explanatory variables in the model, he may get results that are a little strange, because the two explanatory variables, temperature and air-conditioning bills, are themselves highly correlated. As temperatures increase, so do air-conditioning bills. It would be silly to include both variables in the model because they are both doing the same job when it comes to explaining lemonade sales. Of course, identifying multicollinearity is not always this obvious.
