From her firm's computer telephone log, an executive found that the mean length of 69 telephone calls during July was 4.91 minutes with a standard deviation of 5.93 minutes. She vowed to make an...

From her firm's computer telephone log, an executive found that the mean length of 69 telephone calls during July was 4.91 minutes with a standard deviation of 5.93 minutes. She vowed to make an effort to reduce the length of calls. The August phone log showed 47 telephone calls whose mean was 2.868 minutes with a standard deviation of 2.840 minutes.

(b-1) Obtain a test statistict
_calc andp-value assuming unequal variances.(Use the quick rule to determine degrees of freedom. Round your answers to 3 decimal places.)