# ISS Statistics Paper I (New 2016 MCQ Pattern): Questions 219 - 222 of 404

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## Question number: 219

» Probability » Distribution Functions and Properties

### Question

Exponential random variables are often used to model the time until occurrence of a random event where there is an assumed constant risk of the event happening over time, and so are frequently used as a simplest model, for example, in reliability analysis. Since, Number of pizza a person eats in a month is a discrete random variable so it cannot be an exponential random variable.

### Choices

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

a. | 1 | |

b. |
| |

c. | 2 | |

d. | None of the above |

## Question number: 220

» Probability » Discrete and Continuous Random Variables

### Question

Z is the distance traveled by a randomly chosen business consultant last year. Is the random variable Z discrete or continuous?

### Choices

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

a. | Can’t say anything | |

b. | Sometime discrete sometime continuous | |

c. | Discrete | |

d. | Continuous |

## Question number: 221

» Probability » Probability Distributions » Rectangular

### Question

Which of the following statement is/are not correct regarding a random variable?

### Choices

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

a. | A random variable can be uniformly distributed in | |

b. | A random variable can be uniformly distributed in ( . | |

c. | Both a. and b. are correct | |

d. | None of the above |

## Question number: 222

» Probability » Probability Distributions » Binomial

### Question

Let binomial distribution . Let , the moment generating function of is________?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | None of the above |