Posted by **Anonymous** on Wednesday, February 29, 2012 at 8:52am.

a sample of 16 atm transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transactiontime exceeds 60 seconds

- stats -
**PsyDAG**, Wednesday, February 29, 2012 at 12:03pm
Z = (mean1-mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

If 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 the Z score.

## Answer this Question

## Related Questions

- statistics - A sample of 16 ATM transactions shows a mean transaction time of 67...
- statistics 4. - The manufacturer of Porshe 918 Spyder car claims that their car ...
- statistics 4. - The manufacturer of Porshe 918 Spyder car claims that their car ...
- Statistics 4 - The manufacturer of Porshe 918 Spyder car claims that their car ...
- statistics - If a data set has a mean of 10.0 seconds and a standard deviation ...
- statistics - if a data se has a mean of 10.0 seconds & a standard deviation of 2...
- Statistics - If a completion time for a task is normally distributed with a mean...
- statistics - A random sample of 36 statistics students were asked to add a ...
- Statistics - A song must be n longer than 3 minutes and 30 seconds, or (210 ...
- Statistics - A song must be n longer than 3 minutes and 30 seconds, or (210 ...