Question

Using the Empirical Rule, what % of the trees would have heights in the range 40 ft. to 60 ft.?

43) Compute the standard z-score for a tree height of 45 ft.

44) Two related variables vary as follows: As one tends to increase, the other tends to decrease. Name the type of the relationship between the two variables.

45) If the value of the correlation coefficient between two variables is r = -0.9, then what is the strength of the relationship?   A) weak   B) moderate   C) strong

46) A regression equation that predicts y from x between two strongly related variables is y = 7 – 1.5x   Find the predicted value of y when x = 4.

Answer 1