Quiz_6 - Quiz 6 This quiz is based on the lecture material...

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Quiz 6 This quiz is based on the lecture material in Week 7 plus some review from earlier weeks. A measurement system is to be used to measure a critical characteristic y of every part produced in a high volume manufacturing environment. To calibrate the system, 10 standard units (with known values x ) are measured twice each. All measurements are made in microns. The data and some summaries are given below. x y x y 3.0 2.5 5.5 4.7 3.0 2.2 5.5 4.4 3.5 2.7 6.0 5.0 3.5 3.1 6.0 5.1 4.0 3.1 6.5 5.2 4.0 3.5 6.5 4.9 4.5 3.9 7.0 5.6 4.5 3.8 7.0 5.5 5.0 4.1 7.5 5.9 5.0 3.7 7.5 5.8 2 5.25, 4.235, ( ) 41.223, ( ) 31.525 ii i x y xx y == = = ∑∑ Consider the regression model 12 0 ( ) , ,..., ~ (0, ) independent i Yx x R R R G α βσ =+ − + Using the above data, we get 2 ˆ ˆ 0.2072 20 2 i r σ where ˆ ˆ ˆ () i ry αβ = −− . 1. (1 mark)The parameter represents A: the y-intercept B: the average value y when x is known C: the average value of the response variate when the explanatory variate has value x D: the slope 2. (1 mark)The larger the value of A: the more variable will be the response variate B:
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Quiz_6 - Quiz 6 This quiz is based on the lecture material...

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