Twenty students (A to T) were asked how many hours they spent on social media per week. The values recorded are: 8, 0, 4, 3, 9, 7, 2, 5, 6, 6, 7, 4, 5, 0, 3, 2, 2, 1, 8, 4. The arithmetic mean of the time spent per week (in hours) by all the students is:

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)?