The Irradiation of Food to Destroy Bacteria Is an Increasingly

question 5

Essay

The irradiation of food to destroy bacteria is an increasingly common practice. In order to determine which one of two methods of irradiation is best, a scientist took a random sample of 100 one-kilogram packages of minced meat and subjected 50 of them to irradiation method 1 and the remaining 50 to irradiation method 2. The bacteria counts were measured and the following statistics were computed. The scientist noted that the data were normally distributed. $$\begin{array} { | c | c | } \hline \text { Method 1 } & \text { Method 2 } \\\hline \bar { x } _ { 1 } = 86 & \bar { x } _ { 2 } = 98 \\\hline s _ { 1 } ^ { 2 } = 324 & s _ { 2 } ^ { 2 } = 841 \\\hline\end{array}$$ Estimate with 95% confidence the ratio of the two variances.

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Definitions:

Fuser

A component in laser printers and copiers that uses heat and pressure to bond toner powder to paper, producing a printed image.

Smudging

A spiritual or cleansing ritual that involves burning sacred herbs, such as sage, to purify or cleanse a person or space of negative energies.

Laser Printer

A type of printer that utilizes a laser beam to produce an image on a drum, which is then transferred to paper using toner, offering high-quality, fast printing.

Printouts

Hard copies of documents, images, or data produced by a printer.