The mean grade for the entirety of PSYB07 is 68. You wonder if extra tutoring can actually improve grades so you sample 6 students and provide extra tutoring lessons. The final grades of the students you tutor are 75, 77, 75, 68, 75, and 74.

Do you have evidence that tutoring grades worked? Provide your answers below. In it, make sure you have each of the following:

• The mean
• The standard deviation
• The SEM
• The obtained t value
• The critical t value
• Your decision towards the null hypothesis