Distribution

Binomial distribution:

X—B (n,p)

-A discrete probability distribution

-A discrete random variable x follows a binomial distribution if it counts the number of successes

  • n = number of trials

  • p = probability of success

  • The probability of failure is 1-p or q

Binomial PDF - P(x = 2)

Binomial CDF - P(x< 2) OR P(x > 2)

Normal Distribution: Draw a curve

X—N (μ, σ²)

-Measurement of continuous data

-It enables you to model many types of data sets from science and society that involve measurements of continuous data

  • μ = Mean

  • σ² = Standard deviation

1st Standard Deviation = ( 68% / 0.68 )

2nd Standard Deviation = ( 95% / 0.95 )

3rd Standard Deviation = ( 99.7% / 0.997 )

  • Normal CDF - Finding the probabilities (Area under the curve)

  • Inverse Normal - Finding the values if we know the probabilities e.g. lower/upper

  • When finding any information on the right side do 1-(the answer found)