The mean and standard deviation of a group of 25 observations were calculated to be 20 and 5 respectively. It was later found that there was an error in recording one observation; it was recorded as 12 instead of 22. The standard deviation when the error is corrected is (appr ox.):

In a moderately skewed distribution, if Mean = 12 and Median = 8, then using Empirical relation (Mode = 3 Median - 2 Mean), what is the value of Mode?

If 4y - 5x = 15 is the regression line of y on x and the coefficient of correlation between x and y is 0.75, what is the value of the regression coefficient of x on y (bxy)?