Posted by **Marilyn** on Friday, October 3, 2008 at 12:50am.

From her firm’s computer telephone log, an executive found that the mean length of 64 telephone calls during July was 4.48 minutes with a standard deviation of 5.87 minutes. She vowed to make an effort to reduce the length of calls. The August phone log showed 48 telephone calls whose mean was 2.396 minutes with a standard deviation of 2.018 minutes. (a) State the hypotheses for a right-tailed test. (b) Obtain a test statistic and p-value assuming unequal variances. Interpret these results using á = .01. (c) Why might the sample data not follow a normal, bell-shaped curve? If not, how might this affect your conclusions?

## Answer This Question

## Related Questions

- RES/342 - From her firm’s computer telephone log, an executive found that the ...
- Statistics - A set of telephone lines is to be installed so as to connect ...
- math (unanswered, previously posted) - A set of telephone lines is to be ...
- Operations management - An appliance manufacturer wants to contract with a ...
- Precalculus - 1. Here is the frequency table for this distribution (the ...
- statistics - Times for a surgical procedure are normally distributed. There are ...
- math - the Ace telephone Co. charges a flat monthly frr of $22.00 for a ...
- statistics - A sample of 40 CDs from a student's collection showed a mean length...
- Statistics - A telephone company receives 3 calls every minute on an average. If...
- Math - Global Telephone charges 30 dollars for monthly phone service, plus a ...

More Related Questions