Estimate the S I portion of the multiplicative model by finding the ratio-to-moving-averages for the time-series

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Estimate the S × I portion of the multiplicative model by finding the ratio-to-moving-averages for the time-series data. Determine whether these ratio-to-moving-averages are stable from year to year.
Store, which has maintained monthly sales records for the past 48 months, with the following results:

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Business Statistics A Decision Making Approach

ISBN: 9780133021844

9th Edition

Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry

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