Page 9 - Math SL HB Sem 3

Statistics Ard Probability

Example:

Find the mode of the following data:
(a) 0.8, 0.5, 0-7, 0.8, 0.2, 0-5, 0.8

Mode is _=- (the highest frequency)

(b) the occupations for a sample of6 men are teacher, doctor, teacher, manager,
teacher and teacher

Mode is

*Mode
is an important representation for non numcrical data. In this case, we
cannot find the median and main

(c\ 25, f0, 32, 7 t, 9, t s, 60.

The set of data has_ mode-

*All
set oFnumerical data have a median but not all ofthem have mode.

Example:

The number of trucks using a road over a l3_day period is:
4, 6, f,2,7, 8, 3, 5, 5, 7, 6, 6, 4_

For this data set, find.
(a) The mean
(b) 'Ilre median
(c) Thc mode

\. Example:

Given that for a data set xl, x2, ... ,xso, Xio=, r, = 500 and X;o=1(x,)2 = 5100, flnd , and o
\ sotution:

Ir