State University recently randomly sampled ten students and analyzed grade point average (GPA) and number of hours worked off-campus per week. The following data were observed: 
The test statistic for testing whether the two variables are significantly correlated is approximately z = 1.56.
Definitions:
Components in Series
A configuration where components are connected end-to-end in such a way that the failure of one component results in the failure of the entire system.
System Reliability
The probability that a system, including all individual components and processes, will perform its required functions without failure under stated conditions for a specified period of time.
Four-Component Product
A product that is made up of four distinct parts or elements, requiring a detailed product and process design.
Component Reliabilities
The probability that individual components of a system will perform their required functions for a specified period under stated conditions.
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