TABLE 12-13
According to an Article in Marketing News, Fewer

question 98

True/False

TABLE 12-13
According to an article in Marketing News, fewer checks are being written at grocery store checkout stands 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.
$$\begin{array}{l}\text {\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad Year }\\\begin{array} { c | c | c | c } \hline \text { Check Written } & \text { Year 1 } & \text { Year 2}& \text { Year 3 } \\\hline \text { Yes } & 225 & 175 & 125 \\\text { No } & 275 & 325 & 375\end{array}\end{array}$$
-Referring to Table 12-13, the assumptions needed to perform the test are satisfied.

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Definitions:

Blood

A vital liquid in humans and animals that delivers necessary substances such as nutrients and oxygen to cells, and transports metabolic waste products away.

Mother's Blood

The blood circulating in a pregnant woman that provides nutrients and oxygen to the developing fetus.

Gestational Diabetes

A condition in which a woman without diabetes develops high blood sugar levels during pregnancy.

Glucose Challenge Screening

A screening test for gestational diabetes that measures body's response to sugar ingested, usually performed during pregnancy.