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. . Ho: 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: How likely it is to observe a mean number of hours of studying outside of class per week that is different from 30 hours per week. How likely it is in a random sample of 1,500 students to observe that the average number of hours spent per week studying outside of class is at most 27 hours, or at least 33 hours. Not quite right. Recall that in hypothesis testing, in order to assess the evidence, we need to find how likely is it to get data like those observed assuming that the null hypothesis is true. hours