Fifty specimens of a new computer chip were tested for speed in
a certain application, along with 50 specimens of chips with the
old design. The average speed, in MHz, for the new chips was 495.6,
and the standard deviation was 19.4. The average speed for the old
chips was 481.2, and the standard deviation was 14.3.
Can you conclude a significant difference in the mean speed
between the new and old chips?
Verify your result in part a) using...