Before plunging into videoconferencing, a company tested the speed of its internal computer network. The tests were
Question:
(a) Plot the residuals versus the x-variable and in time order, as indicated by the column labeled Hours past 8. Does either plot suggest a problem with the SRM?
(b) Compute the Durbin-Watson D statistic. Does it indicate a problem? For a series of this length, any value of D that is more than 12 away from 2 is statistically significant with p-value smaller than 0.01.
(c) Explain or interpret the result of the Durbin-Watson test.
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Related Book For
Statistics For Business Decision Making And Analysis
ISBN: 9780321890269
2nd Edition
Authors: Robert Stine, Dean Foster
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