When preforming a t- test to determine the significance of a proposed correlation , the t- test value must fall within the non - critical region ( as defined by the critical-t values).

step-by-step explanation:

subtract 7, so the answer is x < = 3, or c.

more detail

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,