I need homework help! Its proportions, but the thing is, I'm terrible at them. All I know is that is/of=x/100.
1 answer:
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Solution :
Group Before After
Mean 693.75 743.75
Sd 155.37 143.92
SEM 54.93 50.88
n 8 8
Null hypothesis : The preparation course not effective.
Alternative hypothesis : The preparation course is effective in improving the exam scores.
(after - before)
The x-intercept is when y=0, so we plug that in our equation,
. +12 on both sides to get 
. Divide by -8 to get 