State University recently randomly sampled seven students and analyzed grade point average (GPA) and number of hours worked off-campus per week. The following data were observed: 
In testing the significance of the regression slope coefficient for the independent variable, HOURS, the calculated test statistic is approximately t = -1.47.
Definitions:
Diabetes Mellitus
A metabolic disorder characterized by high blood sugar levels over a prolonged period due to insulin production or action issues.
Diabetes Insipidus
A condition characterized by excessive thirst and excretion of large amounts of severely diluted urine, resulting from inadequate levels of antidiuretic hormone or the kidney's response to it.
Insulin
A hormone produced by the pancreas that allows cells to absorb glucose from the blood, thus lowering blood glucose levels.
Glucagon
A hormone produced by the pancreas that promotes the increase of blood glucose levels by stimulating the liver to break down glycogen into glucose.
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