# Correlation

**Correlation (Question)**

By using the information from the table below, calculate the correlation between the following set of variables:

- x1 & x2
- x3 & x4
- x5 & x6
- x7 & x8
- x9 & x10

*Guide: *

*Correlation Formula = Covariance(x,y)/(Standard Deviation x * Standard Deviation y)*

**Correlation (Answer)**

- -0.004
- -0.277
- 0.066
- -0.314
- -0.386

x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | x10 |

2 | 2 | 5 | 3 | 1 | 2 | 1 | 5 | 3 | 3 |

0 | 5 | 0 | 4 | 3 | 5 | 3 | 1 | 0 | 4 |

1 | 5 | 1 | 3 | 1 | 2 | 5 | 0 | 2 | 2 |

2 | 0 | 2 | 2 | 3 | 3 | 2 | 1 | 3 | 4 |

5 | 5 | 1 | 3 | 4 | 5 | 5 | 1 | 2 | 5 |

0 | 1 | 3 | 3 | 5 | 3 | 3 | 0 | 2 | 1 |

1 | 4 | 1 | 1 | 0 | 4 | 5 | 3 | 4 | 0 |

0 | 2 | 4 | 0 | 4 | 4 | 3 | 3 | 5 | 1 |

0 | 2 | 5 | 3 | 3 | 0 | 1 | 0 | 3 | 0 |

3 | 4 | 0 | 3 | 3 | 4 | 4 | 1 | 1 | 2 |

5 | 1 | 2 | 0 | 5 | 1 | 2 | 4 | 5 | 3 |

2 | 3 | 1 | 3 | 4 | 1 | 2 | 5 | 0 | 2 |

2 | 0 | 0 | 3 | 5 | 5 | 5 | 1 | 5 | 1 |

1 | 4 | 3 | 1 | 3 | 0 | 4 | 4 | 5 | 1 |

## About Dr Loo - O-level & JC H2 math tutor

I am Dr Loo, a PhD holder with 8 years of teaching experience on secondary school and tertiary level specialize on mathematics and statistics. In addition, I also received teaching training under tertiary setting. Furthermore, I have published 5 research papers on international peer reviewed journals. If you are currenlty looking for mathematics tuition in Singapore, I do provide O-level Math Tutoring & JC Math Tutoring (H1 Math Tuition Class & H2 Math Tuition Class).

Thus, for those who are looking for a JC Math Tutor (H1 Math tutor or H2 Math tutor) as well as O-level Math Tutor, you may contact me for my math tuition in Singapore. I can be contacted through SMS/Whatsapp/Telegram at +65-85483705.