statistic problem...?

0 ⤊

statistic problem...?

A simple random sample of nurses was taken where the mean of their income was $800 per week with a standard deviation of $150 per week. Construct BOTH a 95% AND a 99% confidence interval for the mean income of the population of nurses.

2007-03-22 19:45:41 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2 answers

Use empirical rule for that. I agree with the person above. Just follow the steps with examples in this website

http://www.math.sfu.ca/~cschwarz/Stat-301/Handouts/node35.html

2007-03-22 20:06:32 · answer #1 · answered by Ali 3 · 0⤊ 0⤋

The 95% confidence level is Â± 1.96Ï.
$506 < mean income < $1,094
The 99% confidence level is Â± 2.5758Ï.
$413.63 < mean income < $1,186.37

2007-03-23 03:23:06 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋