Bivariate data often arises from the use of two differenttechniques to measure the same
Chapter 12, Problem 3(choose chapter or problem)
Bivariate data often arises from the use of two differenttechniques to measure the same quantity. As an example,the accompanying observations on x 5 hydrogen concentration(ppm) using a gas chromatography methodand y 5 concentration using a new sensor method wereread from a graph in the article A New Method toMeasure the Diffusible Hydrogen Content in SteelWeldments Using a Polymer Electrolyte-BasedHydrogen Sensor (Welding Res., July 1997:251s256s).x 47 62 65 70 70 78 95 100 114 118y 38 62 53 67 84 79 93 106 117 116x 124 127 140 140 140 150 152 164 198 221y 127 114 134 139 142 170 149 154 200 215Construct a scatterplot. Does there appear to be a verystrong relationship between the two types of concentrationmeasurements? Do the two methods appear to bemeasuring roughly the same quantity? Explain yourreasoning.
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