# ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 429 - 432 of 472

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## Question number: 429

» Statistical Methods » Dispersion

### Question

The marks of 10 students in a particular examination are as follows:

10 | 12 | 15 | 12 | 16 | 20 | 13 | 17 | 15 | 10 |

Later, it was decided that 5 bonus marks will be awarded to each student. The variances in the later case will ________ as compared with the first case.

### Choices

Choice (4) | Response | |
---|---|---|

a. | Increase | |

b. | Not change | |

c. | Decrease | |

d. | Can’t say |

## Question number: 430

» Statistical Methods » Dispersion

### Question

The means of two samples of sizes 50 and 100 respectively are 54.1 and 50.3; the standard deviations are 8 and 7. The standard deviations of the sample of size 150 by combining the two samples will be________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 8.45 | |

b. | 7.56 | |

c. | 6.33 | |

d. | None of the above |

## Question number: 431

» Statistical Methods » Curve Fitting and Orthogonal Polynomials

### Question

The linear least squares approximation of on using monomial polynomials is . Then the values of and is ________ and ________ respectively.

### Choices

Choice (4) | Response | |
---|---|---|

a. | and | |

b. | and | |

c. | and | |

d. | and |

## Question number: 432

» Statistical Methods » Skewness and Kurtosis

### Question

Which of the following statement is/are correct regarding Kurtosis of the data?

### Choices

Choice (4) | Response | |
---|---|---|

a. | Positive kurtosis indicates a relatively flat distribution | |

b. | Negative kurtosis indicates a relatively peaked distribution | |

c. | None of the above | |

d. | Question does not provide sufficient data or is vague |