| Date | None Specimen | Marks available | 2 | Reference code | SPNone.1.sl.TZ0.2 |
| Level | SL only | Paper | 1 | Time zone | TZ0 |
| Command term | Write down | Question number | 2 | Adapted from | N/A |
Question
There are nine books on a shelf. For each book, x is the number of pages, and y is the selling price in pounds (£). Let r be the correlation coefficient.
Write down the possible minimum and maximum values of r .
[2]
a.
Given that \(r = 0.95\) , which of the following diagrams best represents the data.
[1]
b.
For the data in diagram D , which two of the following expressions describe the correlation between x and y ?
perfect, zero, linear, strong positive, strong negative, weak positive, weak negative
[2]
c.
Markscheme
min value of r is \( - 1\), max value of r is 1 A1A1 N2
[2 marks]
a.
C A1 N1
[1 mark]
b.
linear, strong negative A1A1 N2
[2 marks]
c.
Examiners report
[N/A]
a.
[N/A]
b.
[N/A]
c.
