All Airline Passengers Must Pass Through Security Screenings, but Some

question 54

Essay

All airline passengers must pass through security screenings, but some are subjected to additional searches as well. Some travelers who carry laptops wonder if that makes them more likely to be searched. Data for 420 passengers aboard a cross-country flight are summarized in the table shown. Does it appear that being subjected to an additional search is independent of carrying a laptop computer? Explain. $\begin{array}{|c|c|c|c|}\hline &{\text { Searched? }} & \\\hline& \text { Yes } & \text { No } & \text { Total } \\\hline \text { Laptop } & 30 & 42 & 72 \\\hline \text { No laptop } & 145 & 203 & 348 \\\hline \text { Total } & 175 & 245 & 420 \\\hline\end{array}$

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Definitions:

Cancerous

Pertaining to or characteristic of cancer; involving cells that are malignant and have the potential to spread and invade other tissues.

Percentage

A ratio or fraction out of 100 used to express quantities.

Breast Implants

Medical devices implanted under the breast tissue or chest muscles to increase breast size or restore breast volume that has been lost after weight reduction or pregnancy.

Breast Tumors

Abnormal growths in breast tissue, which can be benign (non-cancerous) or malignant (cancerous).