Posted by **Josephine** on Wednesday, July 29, 2009 at 4:40pm.

the following data values are a simple random sample form a population that is normally distributed, with ²= 25.0: 47,33,42,34, and 41. Construct and interpret the 95% and 99% confidence intervals for the population mean.

- business statistics -
**MathGuru**, Thursday, July 30, 2009 at 9:13am
Formula:

CI95 = mean + or - 1.96(sd divided by √n)

...where + or - 1.96 represents the 95% confidence interval using a z-table, sd = standard deviation, √ = square root, and n = sample size.

For 99%, substitute + or - 1.96 in the above formula to reflect the 99% confidence interval.

You already have standard deviation. Find the mean of the data listed. Substitute values into the formula and go from there.

I hope this will help get you started.

## Answer this Question

## Related Questions

Statitic - following data values are a simple random sample from a population ...

statistics - A simple random sample of 25 has been collected from a normally ...

Statistics - A simple random sample of 25 has been collected from a normally ...

statistics - A simple random sample of 25 has been collected from a normally ...

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

statistics - An IQ test was administered to a random sample of 26 mental ...

Statistics - You are given the following information obtained from a random ...

business statistics - for a sample of 12 items from a normally distributed ...

Statistics - (25 pts, 5 pts each) The ounces of coffee that a machine dispenses ...

business statistics - A random sample of size 15 taken from a normally ...