Answer:
2n+13
Step-by-step explanation:

Answer:
2.112
Step-by-step explanation:
don't have one
Answer:
2,880
Step-by-step explanation:
24X12X10=2,880
<em>Hopes This Helps :)</em>
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)
Assuming there was no stop lights, speed bumps, or anyhing else that could slow you down:
227.5