Forty specimens of a new chip were tested for speed in a certain application, along with 40 specimens of chips with the old design. The average speed, in MHz, for the new chips was 436.6, and the standard deviation was 15.8. The average speed for the old chips was 416.0 and the standard deviation was 14.3. Test the hypothesis that the mean speed for the new
chips is greater than that of the old chips.
State the null and alternative hpothesis. b) Compute the test statistics.