The word statistics comes from the Italian word 'statista' that means statesman. In general sense, statistics may be defined as the numerical expression of data related to a specific field or event. On the other sense , it may be define defined as method of collecting , arranging, classifying, presenting, comparing and interpreting numerical data .
Several scholars have defined statistics from their own point of view. Some popular definitions are stated here:
1. According to Philip Enus_
Statistics is the use of data to help the decision maker reach better decisions.
2. According to A.I Bowley_
All statistics are numerical statements od facts in any department of enquiry in relation to each other.
3. According to R.A Fisher_
The science of statistics is essentially a branch of applied mathematics and may be regarded as mathematics applied to observation data.