Question

If the formular-(X-X|Y-Xwere used to find the r-value of the5x буfollowing data, what would be the value of x?XY8496101811912|13A. 8B. 10C. 6D. 4

Answer 1

The value of x⁻, is the mean of the x values of the table.

The mean of x is obtained by adding all values of x, and divided the result by the total number of data, which is 5.

Then, you have:

`\bar{x}=(8+9+10+11+12)/(5)=(50)/(5)=10`

Hence, the mean of x, which is used in the formula to calculate the r-value, is 10