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)
Answer:
i hope this helps
Step-by-step explanation:
Answer:
m=2
Step-by-step explanation:
0-(-2) / 5-4 = 2/1
m =2
The slope is 2 for the given points!
Hope that helps!
Step-by-step explanation:
im not positive but it should be 12% chance that one is defective and then 11% chance when you pull one out