She did 6 for numerator and times 8 for denominator
The residual is -1.5 so the answer is a
The expected value is 8.5 when you plug 4 into the equation
Residual=observed-expected=7-8.5=-1.5
I believe the answer is 311.157055138. That is if i did my math correctly. I hope this helps. Good luck!
30/4 = 7 2/4
= 7 1/2
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(0,2) will be the intersection set.