1 That is, the macro generates a random number for each observation, the data set is sorted by the random number, and then the first num observations are selected.  Then, call the macro select three times once for each of the city data sets .... scollege, pmatilda, and bellefnt .... selecting five observations from each.
A humid continental climate is marked by variable weather patterns and a large seasonal temperature variance. Places with more than three months of average daily temperatures above 10 Â°C (50 Â°F) and a coldest month temperature below â3 Â°C (27 Â°F) and which do not meet the criteria for an arid or semiarid climate, are classified as continental.
Summers can be either hot or warm, but they are always markedly drier than other times of the year. Humid, subtropical climates tend to be in the middle or on the eastern side of continents at 25-45Â° latitude. Summers here are humid with plenty of rain, but winters are usually dry. Some temperate climates have wet and dry seasons while others have no marked dry season at all.