Monday

July 28, 2014

July 28, 2014

Posted by **Brian** on Wednesday, August 1, 2012 at 9:10pm.

I know u: 3.12, sx: .09, n:48, c:.95

What is the formula I use to find the answer? Can anyone please leave a step by step on how to do it so I can learn and do other problems?

- Statistics -
**MathGuru**, Friday, August 3, 2012 at 6:48pmFormula:

CI95 = mean ± 1.96(sd/√n)

...where ± 1.96 represents the 95% interval using a z-table; sd = standard deviation; n = sample size

Your data:

mean = 3.12

sd = .09

n = 48

Plug the values into the formula and determine the interval.

I hope this will help get you started.

**Related Questions**

statistics - A random sample of size 81 is taken from a large population, ...

statistics - 1. A random sample of size 49 is taken from a large population, ...

Statistics - These are the only ones that I am having problems with. Please help...

statistics - A bus company official wanted to estimate the mean time for the ...

statistics - 1. A random sample of size 49 is taken from a large population, ...

business statistics - For one of the tasks in a manufacturing process, the mean ...

statistics - A simple random sample of 60 items resulted in a sample mean of 80...

statistics - A random sample of size 49 is taken from a large population, ...

Statistics - The Internal Revenue Service is studying contributions to charity. ...

Statistics (42) - A simple random sample of 60 items resulted in a sample mean ...