Edexcel IGCSE Physics 复习笔记 3.3.3 Core Practical: Using an Oscilloscope Core Practical 7: Using an Oscilloscope Aim of the Experiment The aim of this experiment is to investigate the freq...
Edexcel IGCSE Physics 复习笔记 3.3.2 Sound & Oscilloscopes Sound & Oscilloscopes An oscilloscope is a device that can be used to study a rapidly changing signal, such as: A sound wav...
Edexcel IGCSE Physics 复习笔记 3.3.1 Core Practical: Investigating the Speed of Sound Core Practical 6: Investigating the Speed of Sound Equipment List Resolution of measuring equipment: Tru...
Edexcel IGCSE Physics 复习笔记 3.2.6 Total Internal Reflection Total Internal Reflection Sometimes, when light is moving from a denser medium towards a less dense one, instead of being refracted, a...
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...
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...
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 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 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 Core Practical 4: Investigating Refraction Aim of the Experiment To investigate the refraction of light using re...
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...
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...
