Question

please help will give medal!!!!!!!!




a linear model for a set of data was y = -20.6 + 9.72x and produced the following residual plot : {Xscl= 1, Yscl= 5}

how do I find the residual if x = 5?????

Answer 1

@ranga

Answer 2

To answer the question I will need the residual plot.
Can you attach the diagram?

Answer 3

To find the residual at x = 5, go 5 units along the x axis and read the y value.

Remember the problem says {Xscl= 1, Yscl= 5}.
That means each markings on the y axis represents 5 units.

So what y value do you get from the plot at x = 5?

Answer 4

y = 25 @ranga

Answer 5

If you go 5 units along the x axis and read the y value it is a little over 1 unit along the negative y axis. And the scale for the y axis is 5 which means each marking represents 5 units So it is a little below -5.

So the residual when x = 5 is y = -5 (or may be even -6 because it is not exactly aligned with y = -5).