Calculating Binomial Probabilities (Edexcel A-Level Mathematics): Quizzes

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Calculating Binomial Probabilities
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What does 'cumulative probability' mean?

Running total of probability

What does the notation P(X≤n)P(X \leq n) represent?

Cumulative probability

Which calculator function calculates P(X≤10)P(X \leq 10) for a binomial distribution?

Binomial CD

Which calculator function finds P(X=5)P(X = 5) for a binomial distribution?

Binomial PD

How is P(X>6)P(X > 6) calculated using cumulative probability?

1−P(X≤6)1 - P(X \leq 6)

What must you do with inequalities that are not ≤\leq?

Convert to calculation using ≤\leq

What is the formula for P(2≤X≤7)P(2 \leq X \leq 7)?

P(X≤7)−P(X≤1)P(X \leq 7) - P(X \leq 1)

If P(X≤7)=0.60103P(X \leq 7) = 0.60103 and P(X≤1)=0.0021331P(X \leq 1) = 0.0021331, find P(2≤X≤7)P(2 \leq X \leq 7).

0.59890.5989

In X∼B(20,0.35)X \sim B(20, 0.35), what does the 20 represent?

Number of trials

When should you use Binomial CD rather than Binomial PD?

For P(X≤n)P(X \leq n) calculations

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Probability Distributions

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