题目
题目
单项选择题

Which type of graph is shown below?

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思路分析
This question asks you to identify the type of graph shown in the image based on its visual features. The chart displays horizontal bars extending from left to right, each represent......Login to view full explanation

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These data come from a case-controlled study to examine the potential relationship between age at first pregnancy and cervical cancer.  In a case-control study a random sample of cases (i.e. people with the disease in question) and controls (i.e. people similar to those in the case group, except they do not have the disease) and the proportion of people with some potential risk factor are compared across the two groups.  In this study we will be comparing the proportion of women who had their first pregnancy at or before the ages of 25, because researchers suspected that an early age at first pregnancy leads to increased risk of developing cervical cancer.  The data is presented in the table below: Age at First Pregnancy <=25 Age at First Pregnancy>25 Cervical Cancer 42 7 Control 203 114 Which graph is an appropriate graph to represent this data?

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