Fоur sаmples оf wаter were tаken frоm locations around a city. The concentration of particulates was measured in parts per billion (ppb) at each location: 40 ppb, 42 ppb. 64 ppb, 77 ppb. This question is part of a quiz or exam given at Arizona State University, copywritten by Dr. L. Chattin. It may not be reproduced, posted or distributed without permission of Arizona State University and L. Chattin. To two decimal places, the standard deviation of this sample is _____ ppb. You must use the online calculator for this problem. Zero credit will be earned if you do not, even if you get the correct answer: ti84calculator.io