|Statistics is the science which is concerned with the collection, presentation and drawing of conclusions from numerical data. The numerical facts and observations collected are done with a specific purpose. |
Scope of Statistics
i) Statistics are a sum total of observations. A single observation cannot form a statistic.
ii) Statistics are expressed quantitatively and not qualitatively.
Limitations of Statistics
i) Statistics laws are not exact. Actually they are true on averages only.
ii) Data collected for some specific purpose may not be suited for another purpose.
Presentation of data
Classes When we divide the values of the variate into convenient groups, we call them Classes
Frequency The number of times the variate occurs is called the frequency of that variate
Directions: Answer the following data. Also write at least 5 examples of your own of a set of data and find is range and frequency distribution.