[Objective: Interpret the Z Test Statistic] Suppose the Janitor Tests

question 56

Multiple Choice

[Objective: Interpret the z test statistic] Suppose the janitor tests 300 light bulbs and finds that 33 bulbs are defective. The calculated test statistic is z=1.21. Select the appropriate interpretation of the test statistic.

• A) A test statistic of 1.21 is 1.21 standard deviations greater than the mean (between 1 and 2 ) indicating that the result is not significant at a level of 0.01 using a one-sided alternative hypothesis.
• B) A test statistic of 1.21 is 1.21 standard deviations greater than the mean (between 1 and 2 ) indicating that the result could be significant using a two-sided alternative hypothesis.
• C) A test statistic of -1.21 is 1.21 standard deviations less than the mean (between 1 and 2 ) indicating that the result could be significant at a level of 0.01 using a one-sided alternative hypothesis.
• D) A test statistic of 1.21 is 1.21 standard deviations less than the mean (between 1 and 2 ) indicating that the result is not significant.

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Definitions:

Chronic Lung Disease

A group of long-term respiratory conditions that block airflow and make it difficult to breathe.

Carotid Artery

A major artery located on each side of the neck that supplies blood to the brain, neck, and face.

Stethoscope

A medical instrument used to listen to sounds within the body, such as the heartbeat or respiratory sounds, aiding in diagnosis.

PMI

Point of maximal impulse; the location on the chest wall where the heart's impulse can be most strongly felt.