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Mathematics, 05.12.2019 03:31 katelynbychurch
The turbine oil oxidation test (t ost) and the rotating bomb oxidation test (rbot) are two different procedures forevaluating the oxidation stability of steam turbine oils. the article "dependence of oxidation stability of steam turbine oilon base oil composition" (j. of the society of tribologists and lubrication engrs., oct. 1997: 19-24) reported theaccompanying observations on x = tost time (hr) and y = rbot time (min) for 12 oil specimens. tost 4200 3600 3750 3675 4050 2770rbot 370 340 375 3 10 350 200tost 4870 4500 3450 2700 3750 3300rbot 400 375 285 225 345 285a. calculate and interpret the value of the sample correlation coefficient (as do the article’s authors).b. how would the value of r be affected if we had let x = rbot time and y = tost time? c. how would the value of r be affected if rbot time were expressed in hours? d. construct normal probability plots and comment. e. carry out a test of hypotheses to decide whether rbot time and tost time are linearly related.
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The turbine oil oxidation test (t ost) and the rotating bomb oxidation test (rbot) are two different...
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