The brain volumes (cm) of 50 brains vary from a low of 902 cm to a high of 1498 cm. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 180.9 cm, assuming the estimate is accurate if it is within 15 cm . . . . The estimated standard deviation is cm 3 (Type an integer or a decimal. Do not round.) Compare the result to the exact standard deviation. O A. The approximation is not accurate because the error of the range rule of thumb's approximation is less than 15 cm. O B. The approximation is not accurate because the error of the range rule of thumb's approximation is greater than 15 cm . O C. The approximation is accurate because the error of the range rule of thumb's approximation is greater than 15 cm. O D. The approximation is accurate because the error of the range rule of thumb's approximation is less than 15 cm