Posted by **caintgetrite** on Thursday, November 4, 2010 at 11:02pm.

for a sample of n = 36, find the probability of a sample mean being less than 12.2 if u = 12 and o = 0.95

- statistics -
**PsyDAG**, Friday, November 5, 2010 at 10:57am
Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

Since only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.

## Answer This Question

## Related Questions

- statistics - The population mean and standard deviation are given. Find the ...
- Statistics - he Oil Price Information Center reports the mean price per gallon ...
- Math- Statistics - A random sample of size 36 is to be selected from a ...
- statistics - The scores of students on the ACT college entrance examination in ...
- Statistics - 1.A sample of 25 bottles is taken from the production line at a ...
- statistics - 1. A random sample of n = 16 scores is selected from a normal ...
- statistics - A random sample of n= 16 scores is selected from a normal ...
- statistics - 7) A final exam in Statistics has a mean of 73 with a standard ...
- statistics - a final exam in statistics has a mean of 73 with a standard ...
- Statistics - The height of a certain species of a tree are normally distributed ...

More Related Questions