Op("standardDeviation") {
        javaPackage = "org.nd4j.linalg.api.ops.impl.summarystats"
        legacy = true
        Input(NUMERIC, "x") { description = "Input variable" }
        Arg(BOOL, "biasCorrected") { description = "If true: divide by (N-1) (i.e., sample stdev). If false: divide by N (population stdev)" }