D: Spearman’s Rank

From the OCR B MEI specification (LINK):

PLAYLIST

Spearman's Rank Correlation Coefficient

01 Introduction

02 EXTENSION Deriving the Formula

03 Calculation Example

04 EXTENSION Tied Ranks

Hypothesis Testing

05 Hypothesis Testing Introduction

06 Hypothesis Testing One Tail Example 1

07 Hypothesis Testing One Tail Example 2

08 Hypothesis Testing Two Tail Example