A Test Is Reliable If It

question 15

Multiple Choice

A test is reliable if it

• A) measures what it claims to measure or predicts what it is supposed to predict.
• B) yields dependably consistent scores.
• C) has been standardized on a representative sample of all those who are likely to take the test.
• D) produces a normal distribution of scores.

Grasp the concept of independence between two variables and how it's determined using probability distributions.

Compute expected values (E) for specific random variables given their probability distributions.

Understand and calculate the variance (V) and standard deviation of random variables and how they reflect the data's spread.

Know how to calculate and interpret the covariance and correlation between two variables, indicating their relationship.

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Definitions:

Botnet

A network of private computers infected with malicious software and controlled as a group without the owners' knowledge, e.g., to send spam messages.

Wide Area Networks

Networks that extend over large geographic areas, connecting devices across cities, countries, or even continents typically through leased telecommunication lines.

Satellite Transmissions

The process of sending and receiving signals to and from a satellite in orbit around Earth, used for communication, navigation, and broadcasting.

Local Area Networks

Networks that connect computers and devices in a limited geographical area, such as a home, school, or office building, to enable communication and resource sharing.