An Access Control Technique Used on the Web to Prevent

question 6

Multiple Choice

An access control technique used on the web to prevent unauthorized software from masquerading as a person, presenting a set of distorted squiggly letters and numbers that people can decipher but computers cannot is called ________.

• A) GOTCHA
• B) a digitial signature
• C) CAPTCHA
• D) a public key
• E) encryption

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Definitions:

Degrees For Freedom

The number of independent values in a statistical calculation that can vary without violating any given constraints.

T-Distribution

A probability distribution that is symmetric and bell-shaped, used particularly for small sample sizes or unknown population standard deviations; synonymous with Student T Distribution but demands a new definition.

Sample Mean

The average of all numerical values in a sample subset of a population, used in statistics to estimate the population mean.

Confidence Interval

A span of numbers, taken from sample data, which is expected to include the actual value of a parameter that is unknown for the entire population.