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Since people get sick at all hours of the day, some nurses who work in hospitals are required to work the night shift. In most cases, the nurses who work the night shift earn a higher hourly wage for the same work as the nurses who work the day shift. This difference in pay is referred to as a
Correlation Coefficient
A numerical value that ranges from -1 to +1 that indicates the strength and direction of a relationship between two variables.
Association
The connection or relationship between two or more concepts, objects, or phenomena, often studied in psychology and sociology to understand how ideas form and evolve.
Point Estimate
A single value or statistic that serves as the best guess or most reasonable approximation of a population parameter.
Hypothesis
An educated guess or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
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