Using 143 observations, assume that you had estimated a simple regression function and that your estimate for the slope was 0.04, with a standard error of 0.01. you want to test whether or not the estimate is statistically significant. which of the following decisions is the only correct one?
a) you decide that the coefficient is small and hence most likely is zero in the population.
b) the slope is statistically significant since it is four standard errors away from zero.
c) the response of y given a change in x must be economically important since it is statistically significant.
d) since the slope is very small, so must be the regression r^2.

i dont understand the question? ?

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct