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A certain brand of at white interior latex paint claims
A certain brand of at white interior latex paint claims onecoat coverage of 400 square feet per gallon. The standard deviation is known to be 20. A sample of 16 gallons is tested.
(a) At α = .05 in a lefttailed test, find the risk and power assuming that the true mean is really 380 square feet per gallon.
(b) Construct a lefttailed power curve, using increments of 5 square feet (400, 395, 390, 385, 380).
(a) At α = .05 in a lefttailed test, find the risk and power assuming that the true mean is really 380 square feet per gallon.
(b) Construct a lefttailed power curve, using increments of 5 square feet (400, 395, 390, 385, 380).
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