Question
While calculating Pearson's correlation coefficient, the
following values are obtained for 25 pairs of observations. It was later discovered that two pairs of observations were not correctly copied they were taken as (X, Y) = (6,14) and (8,6), while the correct values were (8,12) and (6,8). What is the correct value of correlation coefficient? ΣΧ = 125; ΣX2 = 650; ΣΥ = 100; ΕY2 = 460, ΣΧΥ= 508Solution
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A sum of Rs 12,000 becomes Rs 15,600 in 3 years at simple interest. Find the rate of interest per annum.
