教育部钦点白名单赛事，2022中学生水科技发明比赛报名中！
水是人类生命的源泉但水污染已经成为全球性的问题 保护水资源对人类、对地球的意义重大 “美丽中国，我是行动者” 面向国内在校中小学生 被教育部纳入全国性科创赛事“白名单” 全国中学生水科技发明比赛 火热报名中...
英国大学申请系统ucas发布2022年最新数据！
英国大学申请系统ucas近日发布《2022年英国本科申请数据》，中国大陆学生申请量再创历史新高。 中国大陆申请量大涨10% 根据UCAS今天刚刚发布的申请数据，2022年中国大陆通过UCAS申请英国本科的学生人数共31,400人...
IB DP Maths: AI HL复习笔记4.6.1 Linear Combinations of Random Variables
Transformation of a Single Variable What is Var(X)? Var(X) represents the variance of the random variable X Var(X) can be calculated by the formula You will not be required to use this formula in t...
IB DP Maths: AI HL复习笔记4.5.2 Expected Values
Expected Values E(X) What does E(X) mean and how do I calculate E(X)? E(X) means the expected value or the mean of a random variable X The expected value does not need to be an obtainable value of ...
IB DP Maths: AI HL复习笔记4.5.1 Discrete Probability Distributions
Discrete Probability Distributions What is a discrete random variable? A random variable is a variable whose value depends on the outcome of a random event The value of the random variable is not ...
IB DP Maths: AI HL复习笔记4.4.3 Sample Space Diagrams
Venn Diagrams What is a Venn diagram? A Venn diagram is a way to illustrate events from an experiment and are particularly useful when there is an overlap between possible outcomes A Venn diagram c...
IB DP Maths: AI HL复习笔记4.4.2 Conditional Probability
Conditional Probability What is conditional probability? Conditional probability is where the probability of an event happening can vary depending on the outcome of a prior event The event A happen...
IB DP Maths: AI HL复习笔记4.4.1 Probability & Types of Events
Probability Basics What key words and terminology are used with probability? An experiment is a repeatable activity that has a result that can be observed or recorded Trials are what we call the re...
IB DP Maths: AI HL复习笔记4.3.3 Linearising using Logarithms
Exponential Relationships How do I use logarithms to linearise exponential relationships? Graphs of exponential functions appear as straight lines on semi-log graphs How can I use linearised data t...
IB DP Maths: AI HL复习笔记4.3.2 Logarthmic Scales
Logarithmic Scales What are logarithmic scales? Logarithmic scales are scales where intervals increase exponentially A normal scale might go 1, 2, 3, 4, ... A logarithmic scale might go 1, 10, 100,...
IB DP Maths: AI HL复习笔记4.3.1 Non-linear Regression
Non-linear Regression What is non-linear regression? You have already seen that linear regression is when you can use a straight line to fit bivariate data Non-linear regression is when you can use...
IB DP Maths: AI HL复习笔记4.2.3 Linear Regression
Linear Regression Exam Tip Once you calculate the values of a and b store then in your GDC This means you can use the full display values rather than the rounded values when using the linear regres...
