# Most powerful test and its size

am getting halfway to the answer but not being able to get the final result in terms of chi square values

• Hello, A-- . For self study / homework problems, please add the "self study" tag, and show us what you've actually done. We're not just going to answer your homework questions for you! Instead, we'll try to point out mistakes and give advice about what to do next; this helps you learn much better than just seeing the answer. Feb 2 '18 at 20:45
• Hint: the four choices have four distinct DF parameters (4 down to 1), so all you need to determine is the correct DF. You can read that directly off the formula for $f$.
– whuber
Feb 2 '18 at 21:55
• How ?M sorry.M relatively new to this topics and i get lost in small easy things. Feb 2 '18 at 22:14
• I had figured out that the df would do the trick.But i dont know how to get the df. Feb 2 '18 at 22:15