Question
Two random variables x and y have the following
regression equations - 3x + 2y – 26 = 0 6x + y – 31 = 0 then, the mean values of x and y are respectively:Solution
3x + 2y – 26 = 0 6x + y – 31 = 0 The means of X and Y will satisfy the above two equations. So, solving the above two equations we get, Xbar = 4 Ybar = 7
More Statistics Questions
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
{26.11 x 13.96 - (346.95 - 26.04 x 4.18)} = ?
5 (1/2)% of 3599.67 + {18.11% of 2499.67} + √255.11 - 10% of 1799.99 - (63.01 – 47.08) = ?
47.87% of 749.76 + 35.11% of 399.76 = √? + 23.15 × 20.87
? = 38.97² ÷ (3.99⁵ + 5.89 × 107.32) + 58.24% of (512.12 × 21.07)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
84.8% of (680.3 + 12.5 of 8.2) – 22.1 of √9 = ?
3.98 × 29.67 ÷ 11.90 of √24.89 = ?% of 199.79
30.11% of 149.99 + √ 143.97 ÷ 12.02 = ?
