First-time claims for unemployment dipped slightly by 6,000 to 388,000 in the week that ended March 26, the Labor Department announced on Thursday. This is the fifth decrease in the last six weeks. The four-week moving average, a less volatile number that flattens out week-to-week fluctuations in the data, was 394,250, a decrease of 3,250 from the previous week. The Labor Department also reported that for the week that ended March 19, the number of people receiving ongoing unemployment help dropped to 3,714 million, a decrease of 51,000 from the preceding week’s revised level of 3,765,000. Analysts cite a figure below 400,000 as a surer sign to indicate a decline in the unemployment rate. The advanced seasonally adjusted unemployment rate among people eligible for benefits was 3% for the fourth consecutive week. The largest increases in initial claims were in North Carolina, Missouri, Tennessee, Louisiana, and Iowa. Illinois posted the largest decrease, followed by California, Pennsylvania, Ohio, and Washington. These data are reported with a one-week lag.