Edexcel FS2 AS 2023 June — Question 1

Exam BoardEdexcel
ModuleFS2 AS (Further Statistics 2 AS)
Year2023
SessionJune
TopicHypothesis test of Spearman’s rank correlation coefficien

  1. Every applicant for a job at Donala is given three different tasks, \(P , Q\) and \(R\).
For each task the applicant is awarded a score.
The scores awarded to 9 of the applicants, for the tasks \(P\) and \(Q\), are given below.
Applicant\(A\)\(B\)C\(D\)E\(F\)GHI
Task \(\boldsymbol { P }\)1916161281712125
Task \(Q\)1711147618151110
  1. Calculate Spearman's rank correlation coefficient for the scores awarded for the tasks \(P\) and \(Q\).
  2. Test, at the \(1 \%\) level of significance, whether or not there is evidence for a positive correlation between the ranks of scores for tasks \(P\) and \(Q\). You should state your hypotheses and critical value clearly. The Spearman's rank correlation coefficient for \(P\) and \(R\) is 0.290 and for \(Q\) and \(R\) is 0.795 The manager of Donala wishes to reduce the number of tasks given to job applicants from three to two.
  3. Giving a reason for your answer, state which 2 tasks you would recommend the manager uses.