Edexcel IAL S1 2025 May 🔥 [Unofficial] | Blind-solved

CORRECTIONS Q6(d) k should be 505. I mistakenly did 503*14 but it should be 502 in the calc. And hence, accordingly, p should just be 1 - P(Z less than 1) = 1 - 0.8413 = 0.1587 So I actually lost 2 marks there and got 73/75 🙏 🙏 I want nothing more than a subscribe from you 🙏 If you are interested in private online classes 👨‍🏫, email 📧 me at [email protected] You wont regret it 😉. chapters 00:00:00 Introduction 00:01:04 Q1(a) Discrete Random Variable Finding Cumulative Probability 00:01:45 Q1(b) Discrete Random Variable Solving Inequality 00:02:37 Q1(c) Discrete Random Variable Finding Expected Value 00:03:51 Q1(d) Discrete Random Variable Showing Variance 00:05:51 Q1(e) Discrete Random Variable Coding and Variance 00:07:24 Q2(a) Combined Mean Showing a Value 00:08:32 Q2(b) Combined Standard Deviation Finding the Value 00:10:41 Q2(c) Coding Effect on Statistics 00:17:36 Q3(a) Statistical Models Reason for Use 00:19:45 Q3(b) Correlation and Regression Showing Sww 00:21:05 Q3(c) Correlation and Regression Finding Coded S values 00:27:35 Q3(d) Correlation and Regression Finding PMCC 00:28:45 Q3(e) Correlation and Regression Interpreting PMCC 00:30:33 Q3(f) Correlation and Regression Showing Regression Line 00:33:27 Q3(g) Correlation and Regression Coded Regression Line 00:35:18 Q3(h) Correlation and Regression Estimating and Interpreting 00:37:45 Q4(a) Probability Finding Intersection 00:38:45 Q4(b) Probability Finding P(C) 00:40:03 Q5(a) Histograms Calculating Bar Height 00:43:02 Q5(b) Grouped Data Estimating Frequency 00:46:12 Q5(c) Linear Interpolation Estimating Median 00:49:02 Q5(d) Linear Interpolation Finding Quartiles and IQR 00:52:13 Q5(e) Skewness Describing Skewness 00:54:23 Q5(f) Normal Distribution Commenting on Suitability 00:56:05 Q6(a) Normal Distribution Finding Probabilities 00:59:51 Q6(b) Binomial Distribution Finding Probability 01:02:43 Q6(c) Normal Distribution Showing Standard Deviation 01:04:47 Q6(d) Normal Distribution Solving for Constants 01:10:56 Q7(a) Tree Diagrams Completing Diagram 01:12:23 Q7(b) Probability Exactly One Yellow 01:14:30 Q7(c) Probability At Least One White 01:15:29 Q7(e) Probability Showing an Equation 01:23:45 Marking and Review 01:34:08 Outro #edexcelmaths #ialmath