1 Mark questions Give the meaning of correlation. What is absence of correlation? What is scatter diagram? What does it mean if the correlation between two variables is + 1? What is positive correlation? 4 Mark questions Calculate Karl Pearson’s coefficient of correlation from the following:- X:

Correlation Correlation refers to the associations between variables. When an association exists between two variables, it means that the average value of one variable changes as there is a change in the value of the other variable Kinds of correlation:- Positive and Negative correlation. Linear and non – linear correlation. Simple and multiple

Tabulation –A table is a systematic arrangement of related statistical data in columns and rows with some predetermined aim or purpose. Objectives of Tabulation: Helps in understanding and interpreting the data easily. It helps in comparing data. It saves space and time. Tabulated data can be easily presented in the form of