Answer:
3a (2b-3c)
Step-by-step explanation:
9 (8- - 125)
should equal 1197
Answer:
0.86
Step-by-step explanation:
The z-score we need to make the comparison is given by
where
= the standard deviation established in the study
n = the sample size
and for the Normal distribution N(0,1) we want to find
<em>P(X > -1.0801)
</em>
By using a spreadsheet or the table attached, we find that
P(X > -1.0801) = 0.86
(See picture attached)
The answer would be "both groups show about the same average time"
Y=2 7x2= 14
X= 7 4x7=28
28-14=14
Again, I'm really not sure if this is right, and please tell me where I got it wrong if I did.
16. 
17. 
I really hope this helps, and I feel really bad when someone asks me to help and I can't :((