请解释一下20题 谢谢

請問32 34題

請問第7 15 18題

这个题目不太理解

你好，老师 刚课件老师说计算器的第三大功能是计算方差和标准差 那第一大功能和第二大功能分别是什么呢？

另外，degree of freedom视频教课内容也还没有教啊

查表和T这块内容视频并没有介绍啊，怎么考题突然出来了。

题目的解析视频中，SE，standard error是什么，这个概念之前从没介绍过呢

Example 9 (Mosaic Theory): John Doll is a research analyst for a hedge fund that also sells its research to aselect group of paying client investment firms. Doll’s focus is medical technologycompanies and products, and he has been in the business long enough and has been successfulenough to build up a very credible network of friends and experts in the business.Doll has been working on a major research report recommending Boyce Health, a medicaldevice manufacturer. He recently ran into an old acquaintance at a wedding who isa senior executive at Boyce, and Doll asked about the business. Doll was drawn toa statement that the executive, who has responsibilities in the new products area,made about a product: “I would not get too excited about the medium-term prospects;we have a lot of work to do first.” Doll incorporated this and other information aboutthe new Boyce product in his long-term recommendation of Boyce. 请问这个有无违反道德准则呢，书上未正面回答，谢谢老师。

想确定一下我对GDP两种核算的基本原则的理解：支出法可理解为一年之中一个国家的产品和服务是怎样使用的，即个人消费，个人与企业投资，政府支出和外国消费者购买(净出口），而收入法从个人企业和政府的收入来考察，即工资利息收入租金，营业利润和税收，但是税收为什么只包含间接税，是因为直接税实际上已经是个人企业和政府间的利益再分配了?另外为什么要加上折旧？