Serenity has carried out a correlation to determine whether there is a relationship between how old her participants are in years and the number of hours they slept on average per night.
Serenity used the Spearman's rank test to see if her results were significant.
Give two reasons why Serenity used the Spearman's rank test for her data.
1
2
2
AO2 (2 marks)
Credit one mark for each accurate statement in relation to scenario.
For example:
- Serenity was looking to see if there was a correlation between age
in years and the average number of hours slept per night (1)
- The data collected was at least ordinal as age and hours can be
ranked in numerical order (1).
Look for other reasonable marking points.
Generic answers score 0 marks.
(2)