Question: A statistics teacher who teaches in both an online and a face-to-face format is interested in knowing whether the final grades for students in the class are different from each other. From the data in the table below.

1. What is H _o ?
2. What is H _a for a 2-tailed test?
3. What is H _a for a 1-tailed test?
4. What are the possible ramifications of performing a 1-tailed versus a 2-tailed test?
5. Calculate the effect size. If rounding is needed, round to the hundredth.

   Teaching Method	Mean	Standard Deviation
   Lecture (n=127)	84.3	6.4
   Online (n=125)	87.8	4.3

6. Assuming a 2-tailed test with a p-value of .04, and with this calculated effect size, what general conclusions can your draw from these data about the two methods of teaching?

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