You are multiplying the 3x by 6
the last choice is correct
Answer: 18
Step-by-step explanation:
The formula to find the minimum sample size is given by :_
![n=(\dfrac{z^*\cdot \sigma}{E})^2](https://tex.z-dn.net/?f=n%3D%28%5Cdfrac%7Bz%5E%2A%5Ccdot%20%5Csigma%7D%7BE%7D%29%5E2)
, where
= population standard deviation.
z*= critical z-value.
E= Margin of error.
Given : ![\sigma= 13](https://tex.z-dn.net/?f=%5Csigma%3D%2013)
E= ± 8
We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]
Then, the required sample size would be :
![n=(\dfrac{(2.576)\cdot (13)}{8})^2](https://tex.z-dn.net/?f=n%3D%28%5Cdfrac%7B%282.576%29%5Ccdot%20%2813%29%7D%7B8%7D%29%5E2)
![\Rightarrow\ n=(4.186)^2](https://tex.z-dn.net/?f=%5CRightarrow%5C%20n%3D%284.186%29%5E2)
[Round to next integer.]
Hence, the required minimum sample size = 18
Graph the absolute value by using the vertex and a few selected points
Point One: X= -1, Y= -8
Point Two: X= 0, Y= -2
Point Three: X= 1, Y= 4
Point Four: X= 2, Y= -2
Point Five: X= 3, Y= -8
The graph should look something like a mountain or an upside down V
That is true because the square root of 32 is about 5.66, so 4.65 IS less than it.
Answer:
2
Step-by-step explanation:
use your head