22年AP全部科目5分率解析！
今年的AP考试可谓是一波三折，大陆地区一些城市由于疫情AP考试取消。尽管如此，全球AP考试依然进行，AP成绩也在最近公布分数，我们为大家汇总了今年38门考试中，20余门热门AP科目5分率与去年的对比变化。 1AP生物...
IB DP Maths: AI SL复习笔记4.7.4 The t-test
Two-Sample Tests What is a t-test? A t-test is used to compare the means of two normally distributed populations In the exam the population variance will always be unknown What assumptions are need...
IB DP Maths: AI SL复习笔记4.7.3 Goodness of Fit Test
Chi-Squared GOF: Uniform What is a chi-squared goodness of fit test for a given distribution? What are the steps for a chi-squared goodness of fit test for a given distribution? Worked Example Chi-...
Edexcel IGCSE Physics 复习笔记 3.2.5 Core Practical: Investigating Snell's law
Edexcel IGCSE Physics 复习笔记 3.2.5 Core Practical: Investigating Snell's law Core Practical 5: Investigating Snell's Law Aim of the Experiment To investigate the refractive index of glass,...
Edexcel IGCSE Physics 复习笔记 3.2.4 Snell's Law
Edexcel IGCSE Physics 复习笔记 3.2.4 Snell's Law Snell's Law When light enters a denser medium (such as glass) it slows down and bends towards the normal How much the light bends depends on ...
Edexcel IGCSE Physics 复习笔记 3.2.3 Core Practical: Investigating Refraction
Edexcel IGCSE Physics 复习笔记 3.2.3 Core Practical: Investigating Refraction Core Practical 4: Investigating Refraction Aim of the Experiment To investigate the refraction of light using re...
IB DP Maths: AI SL复习笔记4.7.2 Chi-squared Test for Independence
Chi-Squared Test for Independence What is a chi-squared test for independence? You will use a contingency table This is a two-way table that shows the observed frequencies for the different combina...
IB DP Maths: AI SL复习笔记4.7.1 Hypothesis Testing
Language of Hypothesis Testing What is a hypothesis test? A hypothesis test uses a sample of data in an experiment to test a statement made about the population The statement is either about a popu...
IB DP Maths: AI SL复习笔记4.6.2 Calculations with Normal Distribution
Calculating Normal Probabilities How do I find probabilities using a normal distribution? You will be expected to use distribution functions on your GDC to find the probabilities when working with ...
