Answer:
A) 2.58
B) 1.96
C) 1.65
Step-by-step explanation:
A hypothesis used to test that
against the alternatives 
not equal to 10
if null hypothesis is true, then distribution of test statics follow
for two sided alternatives hypothesis 
, then P value is
![P = 2[1- \phi(\left | Zc \right |)]](https://tex.z-dn.net/?f=P%20%3D%202%5B1-%20%5Cphi%28%5Cleft%20%7C%20Zc%20%5Cright%20%7C%29%5D%20)
(1)
a)significance level 
from 1 eq we get
Therefore 
FROM Z TABLE
B) significance level 
from 1st equation we get
Therefore 
FROM Z TABLE
C) significance level 
from 1 eq we get
Therefore 
FROM Z TABLE
Answer:
A= 36
Step-by-step explanation:
a/4+2= A/6
36/6=6
2x+6 <u>></u> -4
trate it as a temporary equals sign
2x+6=-4
subtract 6 rom both sdies
2x=-10
divide both sides by 2
x=-5
put it back
x <u>></u> -5
so the answer is C
To calculate the average, we will use the following rule:
average = sum of scores / number of scores
sum of scores = 85+72+89+90 = 336
number of scores = 4
average = 336/4 = 84%
