Elective Mathematics

1If y = 5 + 4x, then y when x = 1 is ___

2Correlation does not necessarily imply

3Perfect negative correlation has coefficient

4Rankings of 5 students in two tests give Σd² = 9. Find Spearman's coefficient to 2 decimal places.

5Rankings of 5 students in two tests give Σd² = 17. Find Spearman's coefficient to 2 decimal places.

6Rankings of 9 students in two tests give Σd² = 14. Find Spearman's coefficient to 2 decimal places.

7The regression line of y on x is used to predict y from x.

8If y = 3 + 2x, then y when x = 6 is ___

9Spearman's coefficient uses ranks of the data.

10Perfect positive correlation has coefficient