Question
The table below gives the weight x (thousands of pounds) and available heat energy y (million BTU) of a standard cord of various species of
The table below gives the weight x (thousands of pounds) and available heat energy y (million BTU) of a standard cord of various species of wood typically used for heating. Make a scatter plot, do preliminary computations, find the least squares regression line, find SSE, se, and r and so on. In the hypothesis test, use as the alternative hypothesis b1 > 0, and test at the 5% level of significance. Use confidence level 95% for the confidence interval for b1 . Construct 95% confidence and predictions intervals at xp = 5 (i.e., 5,000 lbs) at the end.
x | 3.37 | 3.50 | 4.29 | 4.00 | 4.64 | 4.99 | 4.94 | 5.48 | 3.26 | 4.16 |
y | 23.6 | 17.5 | 20.1 | 21.6 | 28.1 | 25.3 | 27.0 | 30.7 | 18.9 | 20.7 |
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