Answer:
213 samples needed for 99% confidence interval
Step-by-step explanation:
We know that:
minimum size of sample needed to be sure about total measurement less than 3.5 degree is given as
![n = [\frac{z_{\alpha/2}\times s}{E}]^2](https://tex.z-dn.net/?f=n%20%3D%20%5B%5Cfrac%7Bz_%7B%5Calpha%2F2%7D%5Ctimes%20%20s%7D%7BE%7D%5D%5E2)
where,
s is standard deviation = 19.8 degree
E IS MARGIN OF ERROR = 3.5 degree
right tail critical value of
Z 
so, minimum size of sample needed is
![n = [\frac{2.58\times 19.8}{3.5}]^2](https://tex.z-dn.net/?f=n%20%3D%20%5B%5Cfrac%7B2.58%5Ctimes%2019.8%7D%7B3.5%7D%5D%5E2)
n = 213.02
Therefor 213 samples needed for 99% confidence interval
This is a simple question, where the calculation has to be done with clarity for understanding.
Let us assume the unknown number = x
Then we can write the equation as
120x/100 = 160
120x = 160 * 100
120x = 16000
x = 16000/120
= 1600/12
= 133.33
So the unknown number is 133.33. It is not a perfect result but on approximation it can be seen that it is the nearest answer that can be reached. I hope the procedure of doing such problems is clear to you.
Answer:
B
Step-by-step explanation:
The domain is the set of input values, which is typically shown on the horizontal axis.
Answer:
Let's take two prime numbers and two composite numbers.
Prime numbers are 17 and 43
Composite numbers are 25 and 35 (119 and 187 are also composite but let's ignore them)
Now, while arranging it in the 2x2 grid so that the numbers in the neighbor boxes are not co-prime and the numbers in non-neighbor boxes are co-prime, the following arrangement will take place:
=> Number 17 in the upper left box
=> Number 25 in the upper right box
=> Number 35 in the bottom left box
=> Number 43 in the bottom right box.
Answer:
1. 3x²+5x-14/(3x-5)(x-1)
2. x=1.23013 and -1.8968
Step-by-step explanation:
cooking like a chef I'm a 5 star michelin :)
