The U.S. economy grew at a slower pace in November than in October, according to a survey by the nation's purchasing managers. The National Assn. of Purchasing Management's composite index of economic growth eased to 58.9% from 61.8% in October. Officials noted, however, that the October figure was the highest since December, 1983, and that November was the 16th straight month that the indicator topped 50%. In a special question regarding the estimated impact of the stock market crash, 53% said it was too early to tell, 31% said they expect no change, 10% expect a decline and 6% see a moderate increase.