Summarise the three reasons why teachers and students prefer paper books.

When we take notes of what people say, it's important to summarise it in a short message.

summarise函数通过变换求值函数，实现各种不同的汇总操作。（ ）

The purpose of an introduction is: A: to give your aims and methods B: to excite the reader C: to summarise your ideas

Which ONE of the following is NOT a reason for producing a trial balance? A: To help with the preparation of the financial statements B: To identify if there are any errors of principle C: To help summarise the accounting transactions to date D: To identify if there are any errors of single entry

分组之后进行summarise(freq = n())，此处的freq表示 A: 每组的记录数 B: 总的记录数 C: 每组的列数 D: 总的列数

summarise A: v. 投身；献给；为…揭幕 B: v. 减轻；缓解；解除 C: v. 概括(等于summarize)；相加 未知类型：{'url': 'https://nodestatic-ali.fbstatic.cn/static-files/1625561946706_summarise', 'audioId': '1625561946706_summarise', 'duration': 2, 'type': 185}

Question 9. A good paragraph conclusion should____ (tick all that apply) A: ) remind the reader what the paragraph was about B: ) summarise the paragraph’s main points C: ) develop a new idea that has not yet been mentioned D: ) provide a logical link to the next paragraph

数据多维统计的方法有( ) (邓小娟-201617020523-周五) ①EXCEL透视表 ②QUERY中的分组依据 ③PIVOT中的SUMMARISE函数法 ④Power BI下的直接透视 (邓小娟-16级-会计1605) A: ①②③ B: ①②④ C: ②③④ D: ①②③④

下列关于summarise(mtcars, mean(disp),sd(disp),max(disp),any(disp ＞ 10))描述正确的是（ ）。 A: sd是返回方差 B: max是返回最小值 C: mean是返回均值 D: any是不返回括号中条件的观测值