Question

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 x = 1.32 A, with a sample standard deviation of *s* = 0.46 A. Do the data indicate that the Toylot claim of 0.8 A is too low? (Use a 1% level of significance.)

A) State the null and alternate hypotheses.

B) What sampling distribution will you use? What assumptions are you making?

C) What is the value of the sample test statistic? (Round your answer to three decimal places.)

D) will you reject or fail to reject the null hypothesis

Step 1

The provided information are:

Step 2

B)

Since the population standard deviation is unknown and the sample size is small, the appropriate sampling distribution is ** t-distribution with n-1 degrees of freedom**.

**Assumption:** The current drawn...

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