Question

Almonte, Inc., a maker of low-priced hair care products, claims that its hair spray lasts as long as the industry leader’s higher priced product. You take a sample of 60 applications of Almonte’s hair spray and 60 applications of the leading hair spray. Results: On average, the Almonte applications held for 12.7 hours, with a standard deviation of 1.4 hours. On average, the leading hairspray lasted 11.8 hours, with a standard deviation of 1.8 hours. Set up a hypothesis test to test whether the difference in sample means is statistically significant. Use a significance level of 2%. Report and explain your conclusion.


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  • CreatedJuly 16, 2015
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