39     numsamples_ = 1;  in Stat1()
53     numsamples_ = w;  in Stat1()
59     numsamples_ = stat.numsamples_;  in Stat1()
63     numsamples_ = NumType();  in Clear()
70     numsamples_ = stat.numsamples_;
77     numsamples_ += stat.numsamples_;
84     numsamples_ -= stat.numsamples_;
91     numsamples_ *= k;
105   NumType numSamples() const { return numsamples_; }  in numSamples()
112     if (numsamples_ == 0) return VType();  in Mean()
113     return sum_ * (1.0 / numsamples_);  in Mean()
119     if (numsamples_ == 0) return VType();  in Mean()
120     VType mean = sum_ * (1.0 / numsamples_);  in Mean()
123       if (numsamples_ == 1) {  in Mean()
126         VType avg_squares = sum_squares_ * (1.0 / numsamples_);  in Mean()
127         *stddev = Sqrt(numsamples_ / (numsamples_ - 1.0) * (avg_squares - Sqr(mean)));  in Mean()
147   NumType numsamples_;  // sum of weight[i];  variable