66. The following observations are drawn from an approximately normal population:

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

Value | 13 | - 5 | 1 | 3 | - 8 |

- Option : C
- Explanation : The sample variance is given by s2 = 264.8/5-1 = 66.2 The sample standard deviation is simple the square root of the sample variance. The sample standard deviation is 8.13.

67. UBL Fund’s return for the last five years are as follow:

Year | Return (%) |

2009 | -12 |

2010 | 10 |

2011 | 15 |

2012 | 17 |

2013 | 19 |

- Option : A
- Explanation : The Mean Absolute Deviation (MAD) is calculated through the following formula: Mean = (-12+10+15+17+19)/5 = 9.8% MAD = (|-12 - 9.8| + |10 - 9.8| + |15 – 9.8| + |17 – 9.8| + |19 – 9.8|)/5=8.72%.

69. The returns of a fund are given below:

Year | Return % |

2009 | 5.0 |

2010 | -3.2 |

2011 | 6.1 |

2012 | 4.5 |

2013 | 1.3 |

- Option : B
- Explanation : Mean is 2.74. MAD is the mean of the absolute deviations from 2.74: (2.26 + 5.94 + 3.36 + 1.76 + 1.44) / 5 = 2.95.

70. The table below shows the temperatures recorded at different places:

Place | Temperature (degree Celsius) | Place | Temperature (degree Celsius) |

A | 48 | E | 51 |

B | 21 | F | 35 |

C | 10 | G | 16 |

D | -8 | H | -15 |

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