A sample size of n = 64 is drawn from a population whose standard deviation is o = 5.6.
Find the margin of error for a 99% confidence interval for u.

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.

5

step-by-step explanation:

a) 7x=7

step-by-step explanation: