At a Large Automobile Factory,four Different Machines Are Used to Produce

question 55

Multiple Choice

At a large automobile factory,four different machines are used to produce disc brakes.To make sure that the disc brakes are all being produced with comparable diameters,daily samples of 16 disc brakes are taken from the production lines of each of the four machines and their diameters measured.The deviation from the goal diameter of 322 micrometers is measured to the nearest micrometer.Assume that the distribution of these deviations is approximately Normal with a common standard deviation.Does it appear that disc brakes made on the four machines are made with equal mean diameters? SPSS output is included below. Some summary measures for the four machines are given below. Suppose we are interested in the contrast that compares the average of machines 1,3,and 4 (the most recently purchased machines) to machine 2 (a slightly older model) .

What is a 95% confidence interval for the contrast ?

• A)(-33.41,-0.29)
• B)(-22.61,-11.09)
• C)(5.91,17.43)
• D)(12.04,21.66)

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Definitions:

Cartoonists' Labor

The effort and work performed by individuals skilled in creating cartoons, either for entertainment or commentary.

Production Function

A mathematical equation describing the maximum output of a system given certain inputs and resources.

J/L Ratio

Typically refers to the job-to-labor ratio, indicating the number of available job positions per labor unit in the market.

Cartoonists' Labor

The creative and artistic work performed by cartoonists, including drawing and storyboarding.