Let x and y be deviations of two variables from their respective means x̅ and y̅. If the correlation coefficient r = 0.5, ∑xy = 120, the standard deviation σy = 8, and ∑x2 = 90, what is the number of observations 'n'?

Which of the following events is considered a major turning point that fueled Indian nationalism during British rule due to its brutal nature and widespread condemnation?

Which of the following events is considered the first major peasant uprising against the British in India?