A common accepted tradition is that college students study 2 hours outside of class for every hour in class. This means a full-time student taking 15 units (hours of class) studies for 30 hours per week. An educator suspects this figure is different now than in the past.

• H0
• : The average time full-time college students study outside of class per week is 30 hours.
• Ha
• : The average time full-time college students study outside of class per week is not 30 hours.

To substantiate her claim, the educator randomly selects 1,500 college students and finds that they study an average of 27 hours per week with a standard deviation of 1.7 hours.

In order to assess the evidence, we need to determine:

Group of answer choices