One-Tail t-tests. Martin's Footwear, Inc., of Boston, Massachusetts has retained you to aid the firm in an evaluation of its marketing strategy. Martin's "Happy Feet" running shoes are marketed through local retail outlets in the eastern United States. A move to extend Martin's market to Midwestern and western states is currently being contemplated.
A marketing research group conducted an empirical analysis of demand for Martin's "Happy Feet" during 2008 in thirty-six regional markets and found the following (standard errors in parentheses):

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The Answer of One-Tail t-tests. Martin's Footwear, Inc., of Boston, Massachusetts has retained you to aid the firm in an evaluation of its marketing strategy. Martin's "Happy Feet" running shoes are marketed through local retail outlets in the eastern United States. A move to extend Martin's market to Midwestern and western states is currently being contemplated.
A marketing research group conducted an empirical analysis of demand for Martin's "Happy Feet" during 2008 in thirty-six regional markets and found the following (standard errors in parentheses):

One-Tail T-Tests