The manufacturer of Glo-More at white interior latex paint claims one-coat coverage of 400 square feet per gallon on interior walls. A painter keeps careful track of 6 gallons and finds coverage (in square feet) of 360, 410, 380, 360, 390, 400.
(a) At α = .10 does this evidence contradict the claim? State your hypotheses and decision rule.
(b) Is this conclusion sensitive to the choice of ?
(c) Use Excel to find the p-value. Interpret it.
(d) Discuss the distinction between importance and signification in this example.