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Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
Distributions & Random Variables
Watch comprehensive video reviews for Distributions & Random Variables, designed for final exam preparation. Each video includes integrated problems you can solve alongside detailed solutions.
Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
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SL 4.9
If X follows a normal distribution X∼N(μ,σ), we can find the probability P(a<X<b) using a calculator.
Under the hood, the calculator is finding the area under the normal curve between x=a and x=b:
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Example
Given that X∼N(4,1), find P(3<X<4.5).
Using a calculator, we find
normalcdf(3, 4.5, 4, 1) ≈0.533
SL 4.9
If X follows a normal distribution X∼N(μ,σ), we can find the probability P(a<X<b) using a calculator.
Under the hood, the calculator is finding the area under the normal curve between x=a and x=b:
Powered by Desmos
Example
Given that X∼N(4,1), find P(3<X<4.5).
Using a calculator, we find
normalcdf(3, 4.5, 4, 1) ≈0.533