Linear Regression Model

Question

In the regression equation, y is always the dependent variable and x is always the independent variable. What are the three equivalent ways to mathematically describe a linear regression model? When and where I might use these in a business environment?

Question

When trying to estimate a population mean, when will we use a z-value based confidence interval?

Question

When the bisectors of two consecutive angles of a parallelogram meet at a point on the remaining side, what can you conclude about each of the three triangles formed? PROVE each conclusion.

Question

1.What happens to the mean if the same number is added to each number in a data set?

2. What can you say about the mean for a data set with a small range? Or a large range?

3. what’s the differences among the three types of averages: the mean, the median, and the mode.