Normal Distribution - Studytime

QUESTIONS:

NORMAL DISTRIBUTION

2014; 1a, 1c

2013; 1a, 1b, 1c

x - µ

z =

Used for continuous

random variables with

for instance p(X > 70)

bell shaped distribution

For normal distribution to be applicable the situation

The parameters of normal distribution are:

must meet the following conditions:

µ = mean

σ = standard deviation

Variables must be continuous

Formulae for the expected value and variance

The distribution of values follow a symmetrical, bell

are not given in the formula sheet:

shaped curve centred around the mean or expected

value

The expected value is equal to the mean or

central value, µ = E(X)

The central value must be the most commonly

The variance is equal to the standard

occuring value, or the value with the highest

deviation squared, V(X) = σ

probability

0 votes

Parent category: Education