Binomial Distribution

• What is the notation for binomial distribution?

  X ~ B(n, p)
• What is this the notation for X ~ B(n, p)?

  Binomial distribution
• What does the 'p' mean in X ~ B(n, p)?

  Fixed probability of success
• What does 'n' mean in X ~ B(n, p)?

  Fixed number of trials
• When do we use binomial distribution?

  • Fixed number of trials, n
  • FIxed probability of success, p
  • Independant trials
  • Two outcomes, success/failure
• How do you find the mean in a binomial distribution?

  Number of trials x probability of success, np
• How do you find the variance in a binomial distribution?

  Mean x probability of failure
• What is the mean of the binomial distribution X-B(20,0.25)

  5