# Solve this:

The rank correlation coefficient is calculated as follows:

X | Y | R1 | R2 | D | D^{2} |

10 | 2 | 5 | 1 | 4 | 16 |

8 | 4 | 3 | 2 | 1 | 1 |

6 | 8 | 2 | 4 | -2 | 4 |

9 | 10 | 4 | 5 | -1 | 1 |

2 | 6 | 1 | 3 | -2 | 4 |

26 |

$R=1-\frac{6\sum _{{d}^{2}}}{{N}^{3}-N}\phantom{\rule{0ex}{0ex}}=1-\frac{6\times 26}{{5}^{3}-5}=-0.3$

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