1 Press Ctrl-A ©G Dear 2009 – Not to be sold/Free to use Relative Frequency Stage 6 - Year 11 General Mathematics Preliminary

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3 Relative Frequency (1/3) is a number used to estimate the probability of an event. Usually expressed as a decimal. Sometimes as a percentage. Expressed by the formula” Relative Frequency = Number of times event occurs Number of trials

4 Relative Frequency (2/3) My Birthday has been fine 27 times in the last 36 years. What is the relative frequency for fine weather on my birthday? Relative Frequency = Number of times event occurs Number of trials = = 0.75= 75%

5 Relative Frequency (3/3) GradeMark E1-201 D C B A Relative frequency of a) a D? = 5 50 = 0.10= 10% b) Less than C? = 6 50 = 0.12= 12% c) More than C? = = 0.48= 48%