निम्नलिखित आंकड़ों के प्रसरण (variance) का एक अनुमान ज्ञात कीजिए (दशमलव के दो स्थानों तक पूर्णांकित)। वर्ग: 0-10, 10-20, 20-30, 30-40, 40-50 बारंबारता: 8, 16, 24, 25, 17

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)?