Answer:
from largest to smallest
103,1.3(u put this twice?),0.13,0.103
1.03
Hope This Helps!!!
Answer:
155 women must be randomly selected.
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Z-table as such z has a p-value of
.
That is z with a pvalue of
, so Z = 1.645.
Now, find the margin of error M as such
In which
is the standard deviation of the population and n is the size of the sample.
The population standard deviation is known to be 28 lbs.
This means that ![\sigma = 28](https://tex.z-dn.net/?f=%5Csigma%20%3D%2028)
We want 90% confidence that the sample mean is within 3.7 lbs of the populations mean. How many women must be sampled?
This is n for which M = 3.7. So
![M = z\frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=M%20%3D%20z%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
![3.7 = 1.645\frac{28}{\sqrt{n}}](https://tex.z-dn.net/?f=3.7%20%3D%201.645%5Cfrac%7B28%7D%7B%5Csqrt%7Bn%7D%7D)
![3.7\sqrt{n} = 1.645*28](https://tex.z-dn.net/?f=3.7%5Csqrt%7Bn%7D%20%3D%201.645%2A28)
![\sqrt{n} = \frac{1.645*28}{3.7}](https://tex.z-dn.net/?f=%5Csqrt%7Bn%7D%20%3D%20%5Cfrac%7B1.645%2A28%7D%7B3.7%7D)
![(\sqrt{n})^2 = (\frac{1.645*28}{3.7})^2](https://tex.z-dn.net/?f=%28%5Csqrt%7Bn%7D%29%5E2%20%3D%20%28%5Cfrac%7B1.645%2A28%7D%7B3.7%7D%29%5E2)
![n = 154.97](https://tex.z-dn.net/?f=n%20%3D%20154.97)
Rounding up:
155 women must be randomly selected.
Answer:
7
Step-by-step explanation:
So, substitute in your 4 for r, 2(3) + 1. Multiply 2 and 3 to get 6 and then add a to get 7. I hope this helps :)
The answer is B because the bill is $98 plus a 7% tax fee and 16% tip fee.
Answer:
11
Step-by-step explanation:
2^3-(30/5)+9
First, you divide 30/5 because it is in parentheses and we are following this rule for order of operations:
P- parentheses
E- exponents
M- multiplication
D- division
A- addition
S- subtraction
so 30/5 = 6 and plugged in is:
2^3-(6)+9
Next, we do exponents:
2^3 = 2x2x2 = 8
plugged back in:
8-(6)+9
Now, we do the math from left to right so:
8-6=2
2+9=11
11 is your answer