A researcher hypothesizes that students who work more than 20 hours per week will have a lower GPA than the population of all students. She gathers the GPA’s of a sample of 12 students who work more than 20 hours per week.  She already knows the overall mean GPA for the population of students is 2.7.  Here are the sample’s GPAs:  1, 2.5, 1.9, 2.7, 3.0, 2.3, 2.4, 2.9, 2.6, 2.0, 2.4, 2.5. In the space below: What does this mean about working over 20 hours per week compared to the population?

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A researcher hypothesizes that students who work more than 20 hours per week will have a lower GPA than the population of all students. She gathers the GPA’s of a sample of 12 students who work more than 20 hours per week.  She already knows the overall mean GPA for the population of students is 2.7.  Here are the sample’s GPAs:  1, 2.5, 1.9, 2.7, 3.0, 2.3, 2.4, 2.9, 2.6, 2.0, 2.4, 2.5.

  1. In the space below: What does this mean about working over 20 hours per week compared to the population?
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