The Text Reports the Results of a Test for the Significance

question 18

Multiple Choice

The text reports the results of a test for the significance of the difference in average income for random samples of males and females. Males earned an average of about $17,000 more per year and the Z score computed in step 4 was 6.28. Given these results, which of the following is a reasonable conclusion?

• A) The difference is statistically significant, large, and important.
• B) The difference is not statistically significant and was probably caused by random chance.
• C) There is no gender gap in income in the United States.
• D) This difference is statistically significant but quite small.

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Definitions:

Zygomatic Bone

One of the bones that form the prominence of the cheek and part of the lateral wall and floor of the orbit.

Vertebra

The individual bones that make up the vertebral column (spine), providing structural support and protecting the spinal cord.

Mandible

The lower jawbone, which is the largest and strongest bone of the face, involved in chewing and forming the mouth's lower boundary.