Find the 95% Confidence Interval for the Variance of the Lengths

question 4

Multiple Choice

Find the 95% confidence interval for the variance of the lengths of pipes if a sample of 16 pipes has a standard deviation of 12 inches.

• A) \(14.0 < \sigma ^ { 2 } < 10.0\)
• B) \(8.9 < \sigma ^ { 2 } < 18.6\)
• C) \(128.0 \sigma ^ { 2 } < 160.0\)
• D) \(78.6 < \sigma ^ { 2 } < 344.9\)

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Definitions:

Classical Conditioning

An instructional process where pairing two stimuli repeatedly results in a response first prompted by the second stimulus, but eventually prompted by only the first stimulus.

Extinction

A process in which the conditioned response is weakened when the conditioned stimulus is repeated without the unconditioned stimulus.

Acquisition

The gradual formation of an association between conditioned and unconditioned stimuli.

Spontaneous Recovery

A process in which a previously extinguished response reemerges after the conditioned stimulus is presented again.