Question

2011 SEP.[7] Coefficient of correlation between X and Y for 20
Obtain the
Ans. [ 0.67]
items is 0.3; mean of X is 15 and that of Y is 20, standard deviations
are 4 and 5 respectively. At the time of calculation one item of 27
has wrongly been taken as 17 in case of X series and 35 instead
of 30 in case of Y series. Find the correct coefficient of correlation.
Ans. [ 0.515]
Hint. Correct values, Ex = 310; £y = 395; Ex? = 5,260; Eye
8.175; 2xy = 6,335]
(Marks 15)​

Answer 1

Answer:

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