Question: Select all that apply The regression model expressed as Y = a + bX + cX2 Multiple select question. estimates only X and Y. is
Select all that apply The regression model expressed as Y = a + bX + cX2 Multiple select question. estimates only X and Y. is a linear regression model. has a shape if b is positive and c is negative. has a U shape if b is negative and c is positive. can be estimated as a linear regression model by replacing X2 with a new variable Z that is equal to X2. is an example of a non-linear regression model
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