| Date | May Specimen | Marks available | 2 | Reference code | SPM.1.sl.TZ0.4 |
| Level | SL only | Paper | 1 | Time zone | TZ0 |
| Command term | Draw | Question number | 4 | Adapted from | N/A |
Question
Consider the following set of data which is plotted on the scatter diagram below.
Write down the coordinates of the mean point (ˉx, ˉy).
[2]
a.
Write down the value of r, the Pearson’s product-moment correlation coefficient for this set of data.
[2]
b.
Draw the regression line for y on x on the set of axes above.
[2]
c.
Markscheme
(6, 13) (A1)(A1) (C2)
a.
0.952 (0.95202…) (A2) (C2)
Note: Award (A0) for 0.9.
b.
(A1) y intercept at y=1.8 (accept between 1 and 2)
(A1)(ft) line passes through their mean point (A1)(A1)(ft) (C2)
c.
Examiners report
[N/A]
a.
[N/A]
b.
[N/A]
c.
