The Normal Distribution and the Empirical Rule (Leaving Cert Mathematics): Flashcards

Large groups: physical characteristics (height, weight)

Bell-shaped and symmetrical

Curve of normal distribution

$\sigma$

Spread of data from the mean

68%

95%

99.7%

$[\bar{x} - \sigma, \bar{x} + \sigma]$

$[\bar{x} - 2\sigma, \bar{x} + 2\sigma]$

$[\bar{x} - 3\sigma, \bar{x} + 3\sigma]$

68-95-99.7