What is the estimated standard deviation

E Homework: Section 3.2 Question 1, 3.2.1 HW Score: 0%, 0 of 11 points Homework Part 1 of 2 O Points: 0 of 1 Save The brain volumes (cm ) of 50 brains vary from a low of 922 cm to a high of 1456 cm . Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 161.1 cm", assuming the estimate is accurate if it is within 15 cm". The estimated standard deviation is cm3 (Type an integer or a decimal. Do not round.)