a1-22 The sulfate ion concentration in natural water can be determined by measuring the turbidity that resultswhen an excess of BaCl, is added to a measured quantity of the sample. A turbidimeter, the instrumentused for this analysis, was calibrated with a series of standard Na,SO, solutions. The following data wereobtained in the calibration:Cw mg SO;-/LTurbidimeter Reading, R0.000.065.001.4810.002.2815.03.9820.04.61 Assume that there is a linear relationship between the instrument reading and the concentration.(a) Use a spreadsheet to plot the data and include the least-squares line.(b) Compute the least-squares slope and intercept for the best straight line among the points.(c) Calculate the standard deviation for the slope and intercept of the least-squares line.(d) Obtain the concentration of sulfate in a sample yielding a turbidimeter reading of 3.67. Find theabsolute standard deviation and the coefficient of variation.(e) Repeat the calculations in (d) assuming that the 3.67 was the mean of six turbidimeter readings.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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