Hello I'm having trouble with this problem below. What i need to do is find the indicated confidence interval for the population mean u. Can anyone help me please.
c=.95, x=31.39, s=.8, n=82
Thanks for the help in advance.
Hello I'm having trouble with this problem below. What i need to do is find the indicated confidence interval for the population mean u. Can anyone help me please.
c=.95, x=31.39, s=.8, n=82
Thanks for the help in advance.
There'snot much to a CI. The formula is $\displaystyle E=z\cdot \frac{\sigma}{\sqrt{n}}$
You have $\displaystyle {\sigma}$ and n, plug them in. The z score for a 95% is 1.96.
Find that value, then add and subtract it from the mean. That's it.
You should get E=about .17 if you do it right.