Question

For the bivariate frequency table for x and y

	0-10	10-20	20-30	30-40	Sum
0-10	3	2	4	2	11
10-20	–	1	3	1	5
20-30	3	2	–	–	5
30-40	–	6	7	–	13
Sum	6	11	14	3	34

Then the marginal frequency distribution for y is given by

• A. $\begin{matrix} 0 - 10 & 6 \\ 10 - 20 & 11 \\ 20 - 30 & 14 \\ 30 - 40 & 3 \end{matrix}$
• B. $\begin{matrix} 0 - 10 & 11 \\ 10 - 20 & 5 \\ 20 - 30 & 5 \\ 30 - 40 & 13 \end{matrix}$
• C. $\begin{matrix} 0 - 10 & 10 \\ 10 - 20 & 12 \\ 20 - 30 & 11 \\ 30 - 40 & 1 \end{matrix}$
• D. None of these

Answer 1

Answer: (B)

$\begin{matrix} 0 - 10 & 11 \\ 10 - 20 & 5 \\ 20 - 30 & 5 \\ 30 - 40 & 13 \end{matrix}$

Answer 2

It is obvious.