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15 students in one or more AP classes; avg hours of sleep per night = 6;...

15 students in one or more AP classes; avg hours of sleep per night = 6; variance 1

17 students in no AP classes; avg hours of sleep per night = 6.5; variance 2

  1. What is the null hypothesis for this data set?
  2. Using the formulas and provided critical t chart, calculate the t-test.
  3. Is the result significant at .05 (2 tailed test)?
  4. Should we reject or retain the null hypothesis?
Math   Statistics-And-Probability   
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