A Sample Is Random If _________

question 54

Multiple Choice

A sample is random if _________.

• A) each possible sample of a given size has an equal chance of being selected
• B) all members of the population have an equal chance of being selected into the sample
• C) all members of the sample have an equal chance of being selected
• D) a, or a and b
• E) a and c

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Definitions:

Level Shift

A sudden, lasting change in the time series data that can significantly affect the data's trend, usually detected through statistical analysis.

Cycle

In the context of data analysis, a period or sequence of events that repeats regularly.

Trend

The general direction in which something is developing or changing over time.

Control Chart

A graphical tool used in process control to display how a process changes over time, highlighting whether the process stays within predetermined control limits.