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

d) The P-value appropriate for testing versus

e) Is the null hypothesis rejected at

Transcribed Image Text:

Dependent variable is: Weight R squared 99.5% S = 2.949 Variable Coefficient SE(Coeff) t-ratio P-value Intercept 123.141 Day -5.57476 1.382 89.1 0.0001 0.1068 -52.2 0.0001