说明：  1.以身高为例，画出男女生身高的直方图并做对比； 2.采用最大似然估计方法，求男女生身高以及体重分布的参数； 3.采用贝叶斯估计方法，求男女生身高以及体重分布的参数（注明自己选定的参数情况）； 4.采用最小错误率贝叶斯决策，画出类别判定的决策面。并判断某样本的身高体重分别为(160,45)时应该属于男生还是女生？为(178,70)时呢？
(1. taking height as an example, draw the height histogram of male and female students and compare them. 2. the maximum likelihood estimation method is used to find the parameters of height and weight distribution of male and female students. 3. Using Bayesian estimation method, the parameters of height and weight distribution of boys and girls were obtained (indicating the parameters selected by themselves). 4.the minimum error rate Bayes decision is used to draw the decision surface of category decision. And judge whether the height and weight of a sample should be 160,45 or male or female. For (178,70)?)