Answer:
2
Step-by-step explanation:
15+12=27
54 / 27 = 2
Answer:
yes, 6÷1/3, which is 6×3 or 18
Step-by-step explanation:
Not sure sorry I’m not good at math need help with something else..
Answer:
The margin of error for a 99% confidence interval for the population mean is 1.8025.
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 Ztable as such z has a pvalue of
.
So it is z with a pvalue of
, so 
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.
In this problem:

So

The margin of error for a 99% confidence interval for the population mean is 1.8025.
It is the first one on the left ( 4 divided by 7)