CCS 2217, SMA 2103: PROBABILITY AND STATISTICS I
Primary and Secondary Sources of data
Primary and Secondary Sources and Triangulation
Researchers need to consider the sources on which to base and confirm their research and
findings. They have a choice be

CCS 2217, SMA 2103: PROBABILITY AND STATISTICS I
NUMERICAL SUMMARY MEASURES
Include:
1.) Measures of central tendency
2.) Measures of dispersion or scatter
3.) Measures of position
1. Measures of central tendency: give the centre of histogram or frequency

CCS 2217, SMA 2103: PROBABILITY AND STATISTICS I
2. Measures of dispersion or scatter are numerical quantities that measure the degree
of scatteredness or variation of a given data set about the central value, usually the mean.
-They include:
a) Range
b)