mean可以用作名词，表示平均值或中间值。例如：The mean of the data set is 10.这组数据的平均值是10。mean还可以表示方式或方法。例如：There are many means of transportation available in the city.城市里有很多种交通方式可供选择。mean作为动词，可以表示意味着、表示。例如：His silence means...
A data set has the numbers 5, 8, 10, 12, and 15. What is the mean of these numbers? A. 8 B. 10 C. 12 D. 15 相关知识点: 试题来源: 解析 B。本题考查平均数的计算。平均数等于所有数的和除以数的个数,(5 + 8 + 10 + 12 + 15)÷5 = 10。
In a data set, if most of the data points are close to the mean, which of the following is true? A. The variance is large. B. The variance is small. C. The median is large. D. The median is small. 相关知识点: 试题来源: 解析 B。本题考查方差的概念。大多数数据点接近均值,说明...
"Mean"：通常用于描述达成目标的具体行动。例句：Saving money is the only means to keep us out of debt.（节约是避免负债的唯一途径。）"Method"：通常用于描述一个科学、系统的工具或技术。例句：This method of data analysis is reliable and efficient.（这种数据分析方法可靠并且高效。）"Approac...
【题目】The mean of a set of data 1, 2, a is 2, while the only mode of another set of data -1, a, 1,2, bis -1. Then the median of the data -1, a, 1, 2 and bis 相关知识点: 试题来源: 解析 【解析】1 反馈 收藏 ...
Question 10: A set of data consists of 20 numbers. The mean of the numbers is 8 and the standard deviation is 3.(a)Calculate∑x∂nd∑x^2 and(b) A sum of certain numbers is 72 with mean of 9 and the sum of the squares of these numbers of 800, is taken out from the set ...
Of course, this set of values is very simple compared to data sets you’re likely to encounter in real life. In cases when there is too much data to look at all at once, there are often special tools (such as those used in spreadsheet software) that you can use to determine the me...
url- This is the url/name of the MongoDB database to use, and is set by default tomean-devfor the development environment. debug- Setting this option totruewill log the output all Mongoose executed collection methods to your console. The default is set totruefor the development environment...
(JWTs), which are more secure, but require a much longer space to explain than what I have here; “npm install --save passport-jwt” brings it into the project. JWTs are a packed set of a variety of different data elements, one of which can be a shared secret (à la...
If it isn’t, then you test whether it’s a number, so that regardless of what was passed in, you ultimately end up with an Upvote object holding the data in question. The truly mind-bending part of this code is in the “else” block—we assign “votes” a n...