The Quality Engineer at a Paint Manufacturer Conducted a Hypothesis

question 8

Essay

The quality engineer at a paint manufacturer conducted a hypothesis test to test the claim that the mean volume of paint cans had changed after an adjustment in the manufacturing process. Mean volume in paint cans before the adjustment was 1.02 gallons. Assume that all conditions for testing have been met. She used technology to complete the hypothesis test. Following is the null and alternative hypothesis and the output from her graphing calculator. Write a statement explaining what her decision regarding the null hypothesis should be and a statement summarizing her conclusion regarding the claim that average volume of paint cans had changed. Has the adjustment in the manufacturing process changed the average volume of paint cans?

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Definitions:

Variable-interval

A timing schedule in operant conditioning where reinforcement is provided after an unpredictable time interval, leading to a steady rate of response.

Fixed-interval

In behavioral psychology, this is a reinforcement schedule that delivers a reward for the first response following a predetermined time interval.

Variable-ratio

A reinforcement schedule in which a response is reinforced after an unpredictable number of responses, which tends to produce high rates of response.

Fixed-ratio

A reinforcement schedule in which a response is rewarded after a predetermined number of responses.