10.43 The average length of a flight by regional airlines in the United States has been reported as 464 miles. If a simple random sample of 30 flights by regional airlines were to have }x 5 479.6 miles and s 5 42.8 miles, would this tend to cast doubt on the reported average of 464 miles? Use a two-tail test and the 0.05 level of significance in arriving at your answer. Source: Bureau of the Census, Statistical Abstract of the United States 2009, p. 664.