Answer:
A
The correct option is C
B
The value of z-test is
Step-by-step explanation:
From the question we are told that
The null hypothesis
The alternative hypothesis
The level of significance is
The sample proportion is
The sample size is n = 180
Generally from central limit theorem
if np and nq are > 5 then normal sampling distribution can be used
So
np = 180 * 0.22 = 39.6 > 5
and
nq = 180 * (1 -0.22) = 140.4 > 5
So normal sampling distribution can be used
Generally the z-test is mathematically represented as
=>
=>
Answer:
6
Step-by-step explanation:
f(x)=(x+1)2
f(2)=(2+1)2
f(2)=(3)2
f(2)=6
64. 26*3=78, 11*3=33, 78-33=45, 45+19=64
Answer: 12 h ; 45 m
Step-by-step explanation:
*Important: From what I can see in this image, this appears to be a test. If this is the case, please do not cheat. In any case, here is the explanation.
What we know:
- Progress has been made to 4.75
- Rate of digging is 3/5 mph
- Depth must be at least 12 1/2
- We need to find the minimum amount of time the machine works
How to solve:
By setting up an algebraic equation, we can solve this.
Process:
- Set up equation 4.75 + 3/5x = 12 1/2
- Convert 19/4 + 3/5x = 12 1/2
95/20 + 12/20x = 250/20
12/20x= 155/20
- Isolate x via division /(12/20) /(12/20)
- +Simplify
x= 12 11/20
Solution: 12 ; 45
Answer:
(3.14)(22)=69.08
Step-by-step explanation:
since its diameter and not radius you don't multiply by 2