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以弯管差压测流中１６组流量ｑ与压差Δｐ的随机数据为例，用数理统计法证明了弯管流量服从正态分布，用线性回归方法求得了弯管流量系数Ｋ值，并证明了弯管流量ｑ和压差开方Δｐ的线性回归效果极显著。
Take the random data of 16 sets of flow rate q and pressure difference Δp in the differential pressure measuring flow of the elbow as an example, it is proved by mathematical statistics that the flow rate of the elbow follows the normal distribution, and the flow coefficient K of the elbow is obtained by the linear regression method It is proved that the linear regression of elbow flow q and differential pressure square Δp is significant.