A Local Newspaper Claims That $70 \%$ Of the Items Advertised in Its Classifieds Section Are Sold

question 267

Essay

A local newspaper claims that $70 \%$ of the items advertised in its classifieds section are sold within 1 week of the first appearance of the ad. To check the validity of the claim, the newspaper randomly selected $n = 25$ advertisements from last year's classifieds and contacted the people who placed the ads. They found that 16 of the 25 items sold within a week. Based on the newspaper's claim, is it likely to observe $x \leq 16$ who sold their item within a week? Use a binomial probability table.

Recognize the effects and risks associated with teratogens during pregnancy.

Describe the different domains of development (physical, socio-emotional, cognitive) and their relevance across the lifespan.

Understand the importance and role of hormonal changes in development.

Analyze the role of environmental factors and their impact on development from conception.

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Definitions:

Stomach Acids

The highly acidic gastric juices produced by the stomach's lining, primarily hydrochloric acid, which helps in the digestion of food and killing of ingested pathogens.

Salivary Amylase

An enzyme found in saliva that starts the digestion of starches into sugars while food is still in the mouth.

Lipids

A group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins, and others, which are crucial for cell structure and metabolism.

Fatty Acids

Long chains of hydrocarbons terminated with a carboxylic acid group, essential components of lipids.