TABLE 12-6
According to an article in Marketing News, fewer checks are being written at the grocery store checkout than in the past. To determine whether there is a difference in the proportion of shoppers who pay by check among three consecutive years at a 0.05 level of significance, the results of a survey of 500 shoppers in three consecutive years are obtained and presented below.
-Referring to Table 12-6, what is the value of the test statistic?
Definitions:
Mm Hg
Millimeters of mercury; a unit of pressure commonly used in measuring blood pressure.
White Blood Cells
Cells of the immune system involved in defending the body against both infectious disease and foreign materials.
Arteries
Blood vessels that carry oxygenated blood away from the heart to various parts of the body.
Veins
Blood vessels that carry blood towards the heart, typically oxygen-depleted, except for the pulmonary and umbilical veins.
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