Climatic conditions, however, vary depending on altitude. Normal value ranges may vary slightly between laboratories. Beyond this point, costs may vary widely. Nationally, mean daily minimums usually vary from about . However this can vary from location to location. However temperatures do vary in various locations. Thus climatic statistics can vary greatly over short distances. However, they vary considerably in type. The definitions may vary somewhat, according to source. However, these values often vary significantly by month. However, this figure could vary considerably. Law firms can vary widely in size. However, trials can vary greatly in quality. Groups can vary drastically from one another. Rules on this vary considerably, however.