Q12. Calculate the mean height of 20 rice plants. Height of 20 rice plants recorded in
centimeters were as follows:
55, 52, 53, 57, 58, 50, 54, 56, 51, 60, 65, 67, 68, 64, 62, 69, 74, 72, 75, 70.
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The measure of correlation is only a measure of co-variation. It is a numerical measurement
of the extent to which correlation can be found between two or more than two variables. It
does not prove causation. Correlation may happen because of several reasons like: (i) due to
pure chance, (ii) both the correlated variables may be influenced by one or more other
variables., and , (iii) both the variables may be mutually influencing each other so that neither
can be designated as the cause and the other the effect. Thus, whether the changes in
variables indicate causation or not, must be decided on other evidence than on the degree of
correlation.
Explanation:
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