Question 15Let ¯x be the mean of x1,x2,……xn, and ¯y be the mean of y1,y2,……yn. If ¯z represents the mean of x1,x2,……xn,y1,y2,……yn, then ¯z is equal to:A) ¯x+¯yB) ¯x+¯y2C) ¯x+¯ynD) ¯x+¯y2n

Question 15Let ¯x be the mean of x1,x2,……xn, and ¯y be the mean

1.	Question 15Let ¯x be the mean of x1,x2,……xn, and ¯y be the mean of y1,y2,……yn. If ¯z represents the mean of x1,x2,……xn,y1,y2,……yn, then ¯z is equal to:A) ¯x+¯yB) ¯x+¯y2C) ¯x+¯ynD) ¯x+¯y2n
Answer» Question 15 Let $¯ x$ be the mean of $x_{1}, x_{2}, \dots \dots x_{n}$ , and $¯ y$ be the mean of $y_{1}, y_{2}, \dots \dots y_{n}$ . If $¯ z$ represents the mean of $x_{1}, x_{2}, \dots \dots x_{n}, y_{1}, y_{2}, \dots \dots y_{n}$ , then $¯ z$ is equal to: A) $¯ x + ¯ y$ B) $\frac{¯ x + ¯ y}{2}$ C) $\frac{¯ x + ¯ y}{n}$ D) $\frac{¯ x + ¯ y}{2 n}$