问答题
测量血压14次,记录收缩压,得样本如下:
121,123,119,130,125,115,128,126,109,112,120,126,125,125
求样本均值,样本方差,样本中位数,众数和极差。
测量血压14次,记录收缩压,得样本如下:
121,123,119,130,125,115,128,126,109,112,120,126,125,125
求样本均值,样本方差,样本中位数,众数和极差。