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Get Full Access to Probability And Statistics For Engineering And The Sciences - 9 Edition - Chapter 12.1 - Problem 3
Get Full Access to Probability And Statistics For Engineering And The Sciences - 9 Edition - Chapter 12.1 - Problem 3

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# Bivariate data often arises from the use of two differenttechniques to measure the same

ISBN: 9781305251809 122

## Solution for problem 3 Chapter 12.1

Probability and Statistics for Engineering and the Sciences | 9th Edition

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Problem 3

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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th Tuesday, April 18 • Example 3: Zodiac Signs for Football Coaches Suppose you suspect that some zodiac signs produce superior personality qualities t hat affect leadership in coaching football. You categorize the zodiac sign for a random selection of 256 college & high school football coaches. Are birth signs distributed equally among football coaches or not a. Hypotheses H :0 Births are spread evenly over zodiac signs; p aries =taurus = … pisces = 1/12

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