Finance

Quiz 2

* The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.

Time (in Minutes) | Relative Frequency |

0 but less than   5 | 0.37 |

5 but less than 10 | 0.22 |

10 but less than 15 | 0.15 |

15 but less than 20 | 0.10 |

20 but less than 25 | 0.07 |

25 but less than 30 | 0.07 |

30 or more | 0.02 |

Referring to the table, what is the width of each class?

* 1 minute

* 100%

* 5 minutes

* 2%

* The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.

Time (in Minutes) | Relative Frequency |

0 but less than   5 | 0.37 |

5 but less than 10 | 0.22 |

10 but less than 15 | 0.15 |

15 but less than 20 | 0.10 |

20 but less than 25 | 0.07 |

25 but less than 30 | 0.07 |

30 or more | 0.02 |

Referring to the table, if 1000 calls were randomly sampled, how many calls

lasted under 10 minutes?

* 220

* 590

* 410

* 370

* The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier

Time (in Minutes) | Relative Frequency |

0 but less than   5 | 0.37 |

5 but less than 10 | 0.22 |

10 but less than 15 | 0.15 |

15 but less than 20 | 0.10 |

20 but less than 25 | 0.07 |

25 but less than 30 | 0.07 |

30 or more | 0.02 |

Referring to the table, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

* 0.76

* 0.10

* 0.59

* 0.84

* When studying the simultaneous responses to two categorical questions, we should set up a

* Cumulative percentage distribution table

* Histogram

* Contingency table

* Frequency distribution table

* A sample of 200 students at a large university was taken after the final exam to ask them whether they went out on the...