Statistics Solutions

(See Steps) Toys: Electric Trains. The Toylot Company makes an electric train with a motor that it claims will draw an average of only 0.8 ampere (A) under

Question: Toys: Electric Trains. The Toylot Company makes an electric train with a motor that it claims will draw an average of only 0.8 ampere (A) under a normal load. A sample of nine motors was tested, and it was found that the mean current was \(\bar{x}=1.4 \mathrm{~A}\), with a sample standard deviation of \(s=0.41 \mathrm{~A}\). Do the data indicate that the Toylot claim of \(0.8 \mathrm{~A}\) is too low? (Use a \(1 \%\) level of significance.)

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