Which of the following shows the correct order of the number below (1/2)^2, 2/3,0.45 a. (1/2)^2< 0.45< 2/3 b. (1/2)^2< 2/3< 0.45 c. 0.45< (1/2)^2< 2/3

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed