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A machine produces pipes used in airplanes. The average length of the pipe is 16 inches. The acceptable variance for the length is .3 inches. A sample of 25 pipes was taken. The average length in the sample was 15.95 inches with a variance of .4 inches.
a.Construct a 95% confidence interval for the population variance.
b.State the null and alternative hypotheses to be tested.
c.Compute the test statistic.
d.The null hypothesis is to be tested at the 5% level of significance. State the decision rule for the test using the critical value approach.
e.What do you conclude about the population variance?
Eye Muscles
The muscles that move the eye and control the dilation of the pupil; critical for vision and eye movement.
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The condition of being able to see distant objects more clearly than objects that are near.
Habituation
The process of becoming accustomed to a stimulus after repeated exposure, leading to a decrease in the response to that stimulus over time.
Dishabituation
The renewal of attention or response to a novel stimulus after habituation has occurred to a previous stimulus.
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