Mathematics, 05.12.2019 18:31 Ashleymsmith
In a study relating the degree of warping, in mm, of a copper plate (y) to temperature in °c (x), the following summary statistics were calculated:
n=40, x¯=26.36, y¯=0.5188,∑ni=1(xi−x¯)2=98,775, ∑ni=1(yi−y¯)2=19.75,∑ni=1(xi−x¯)(yi −y¯)=806.94.
a. compute the least-squares line for predicting warping from temperature. round the answers to four decimal places.
y = ? ? + ? ? x
b. predict the warping at a temperature of 40°c. round the answer to three decimal places.
? ? mm
c. at what temperature will we predict the warping to be 0.5 mm? round the answer to two decimal places.
? ? °c
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