and Progress descriptor 6a ~ B(15, 0.5) B1 3.1b 5th X B1 for binomial B1 3.1b Understand the binomial B1 for 15 and 0.5 distribution (and its notation) and its use as a model. (2) from calculator P(X = 8) = 0.19638… M1 3.4 6bi 5th A1 1.1b Calculate binomial probabilities. (2) 6bii P(X = 1 P(X M1 3.4 6th – 4) 3) = 1 0.0176 Use statistical – tables and = awrt 0.982 or A1 1.1b calculators to find cumulative binomial probabilities. (2) (6 marks) Notes 6bi P(X = 8) = P(X 8) P(X 7) = 0.6964 0.5 – – or or or = awrt 0.196 or Pearson Progression Step Q Scheme Marks AOs and Progress descriptor Binomial (distribution). 1.2 7a B1
and Progress descriptor 6a X ~ B(15, 0.5) B1 for binomial B1 for 15 and 0.5 B1 B1 3.1b 3.1b 5th Understand the binomial distribution (and its notation) and its use as a model. (2) 6bi from calculator P(X = 8) = 0.19638… M1 A1 3.4 1.1b 5th Calculate binomial probabilities. (2) 6bii P(X 4) = 1 – P(X 3) = 1 – 0.0176 M1 3.4 6th Use statistical tables and calculators to find cumulative binomial probabilities. = awrt 0.982 or A1 1.1b (2) (6 marks) Notes 6bi P(X = 8) = P(X 8) – P(X 7) = 0.6964 – 0.5 or or or = awrt 0.196 or Q Scheme Marks AOs Pearson Progression Step and Progress descriptor 7a Binomial (distribution). B1 1.2
as_maths_statistics_unit_4_ms.docx