Brain Volume Using all of the brain volumes listed in Data Set 9 “IQ and Brain Size,” we get this 95% confidence interval estimate: 9027.8 6 s2 6 33,299.8, and the units of measurement are (cm3)2. Identify the corresponding confidence interval estimate of s and include the appropriate units. Given that the original values are whole numbers, round the limits using the round-off rule given in this section. Write a statement that correctly interprets the confidence interval estimate of s.