A rods manufacturer makes rods with a length that is supposed to be 16

inches. A quality control technician sampled 32

rods and found that the sample mean length was 16.06

inches and the sample standard deviation was 0.16

inches. The technician claims that the mean rod length is less than 16

inches.

What type of hypothesis test should be performed?

What is the test statistic?

What is the number of degrees of freedom?

Does sufficient evidence exist at the =0.05

significance level to support the technician's claim?

Select

Left-tailed t-test

Two-tailed t-test

Right-tailed z-test

Right-tailed t-test

Select

Yes

No

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