並前往https://estat.pixnet.net/blog/post/61836193-sas%E4%B8%AD%E7%9A%84%E6%8F%8F%E8%BF%B0%E6%80%A7%E7%B5%B1%E8%A8%88%3A-proc-means%E6%8C%87%E4%BB%A4