On EBayCom,the Internet Auction Website,sellers Design the Web Page on Which

question 139

Multiple Choice

On eBay.com,the Internet auction website,sellers design the web page on which they sell their merchandise.One individual who was selling a Coca-Cola tray from the 1920s used a background that resembled fluffy clouds in a blue sky.The page contained six pictures of the tray from different angles and an animated depiction of an American flag.Many potential buyers abandoned the web page before all the pictures downloaded.The seller must have been unaware of the

• A)eight-second rule.
• B)80/20 principle.
• C)stickiness principle.
• D)hierarchy of needs.
• E)efficiency rule.

Understand the chi-square test and its applications.

Identify when and how to set up a null hypothesis in statistical testing.

Apply concepts of simple random sampling in statistical analysis.

Analyze statistical data to infer about population characteristics.

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Definitions:

Sample Mean

The average value of a set of data points collected from a sample of a population.

Median

The middle value of a data set when it is ordered from least to greatest, effectively splitting the data set into two equal parts.

Sample Variance

A measure of the variability or spread of a sample data set, calculated as the average of the squared differences from the sample mean.

Sample Mean

The mean of a collection of numbers, determined by adding all the values together and then dividing the total by the count of values in the set.