A board of directors at the Anchor Pointe Marina is studying the usage of boats among its members. A sample of 30 members who have bots 10 to 20 feet in length showed that they used their boats an average of 11 days last July. The standard deviation of the sample was 3.88 days. For a sample of 40 members with 21 to 40 feet in length, the average number of days they used their boats in July was 7.67, with standard deviation of 4.42 days. At the 0.02 significance level, can the board of directors conclude that those with the smaller boats used their crafts more frequently?