9.37Samples of two different models of cars were selected, and the actual speed for each car was deter-mined when the speedometer registered 50 mph. The resulting 95% confidence intervals for mean actual speed were (51.3, 52.7) and (49.4, 50.6). Assuming that the two sample standard deviations are equal, which confi-dence interval is based on the larger sample size? Explain your reasoning.