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The Turbine Oil Oxidation Test (TOST) and the Rotating Bomb Oxidation Test (RBOT) are two different procedures for evaluating the oxidation stability of steam turbine oils. An article reported the accompanying observations on x TOST time (hr) and y RBOT time (min) for 12 oil specimens TOSTI 4200 3600 3750 3700 4050 2770 200 370 340 375 350 RBOT TOST RBOT 305 4870 4525 3450 26753750 3300 400 380 285 220 345 290 (a) Calculate the value of the sample correlation coefficient. (Round your answer to four decimal places.) r9271please help finding r

math   Statistics-And-Probability   
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step 1: Find X. Y. X2 and Y2 as it was done in the table below 4200 3600 3750 3700 4050 2770 4870 4525 3450 2675 3750 3300 370 340 375 305 350 200 400 380 285 220 345 290 1554000 1224000 1406250 1128500 1417500 554000 1948000 1719500 983250 588500 1293750 957000 X.X 17640000 12960000 14062500 13690000 16402500 7672900 23716900 20475625 11902500 7155625 14062500 10890000 136900 115600 140625 93025 122500 40000 160000 144400 81225 48400 119025 84100 Step 2: Find the sum of every column to get: ΣΧ-44640, ΣΥ-3860, ΣΧ.Y-14774250, ΣΧ2-170631050, ΣΥ2-1285800 Step 3: Use the following formula to work out the correlation coefficient. 12.14774250-44640 3860 0.9238 12.170631050 44640 12.1285800-38602

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