A soap manufacturer tested a standard bar of soap to see how long it would last. A test subject showered with the soap each day for 15 days and recorded the Weight (in grams) of the soap after the shower. The resulting regression computer output looks, in part, like this:

Find the following facts in this output, or determine them from what you know.
a) The standard deviation of the residuals
b) The slope of the regression line
c) The standard error of b1
d) The P-value appropriate for testing H0: β1 = 0 versus HA: β 1 ‰  0
e) Is the null hypothesis rejected at α = 0.05?

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Dependent varible is: Weight R-squa red = 99 , 5% s2.949 Variable Coefficient SE (Coeff) t-Ratio P-Value Intercept 123.141 1.382 89.1 <0.0001 Day -5.57476 0.106852.2 <0.0001