class org.apache.commons.math.stat.descriptive.DescriptiveStatistics (implements java.io.Serializable, org.apache.commons.math.stat.descriptive.StatisticalSummary)
class org.apache.commons.math.stat.descriptive.DescriptiveStatisticsImpl (implements java.io.Serializable)
class org.apache.commons.math.stat.descriptive.SummaryStatistics (implements java.io.Serializable, org.apache.commons.math.stat.descriptive.StatisticalSummary)
class org.apache.commons.math.stat.descriptive.SummaryStatisticsImpl (implements java.io.Serializable)