Question: 16. In a study of internal combustion engines, the data given were observed with Y (in units of BTU/lb), the net work provided by a

16. In a study of internal combustion engines, the data given were observed with Y (in units of BTU/lb), the net work provided by a cylinder, as a function of the fuel fraction X, where 0 < X ≤ 1.

Fuel fraction 0.15 0.20 0.25 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.0 Net work 120 165 204 238 296 373 410 462 520 580 600 BTU/lbs of air 403 455 518 420 464 525 408 Fit a straight-line to the data and test the hypothesis that the true slope is zero. Use the 5% significance level.

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