Economice

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Grading Summary |

These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. | Date Taken: | 10/30/2011 |

Time Spent: | 10 secs |

Points Received: | 20 / 40  (50%) |

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Question Type: | # Of Questions: | # Correct: |

Multiple Choice | 10 | 5 |

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Grade Details |

 1. | Question : | Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance.

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  | Student Answer: | | .375 |

  | | | .150 |

  | | | .500 |

  | | | .300 |

  | | | .333    |

  | Instructor Explanation: | Relative Frequency Calculations: Frequency/Total Frequency

  Total Frequency = 40, Relative Frequency for the shortest Distance: 15 /40 = 0.375 |

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  | Points Received: | 4 of 4 |

  | Comments: | |

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 2. | Question : | The following is a relative frequency distribution of grades in an introductory statistics course.

If this was the distribution of 200 students, find the frequency of failures: |

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  | Student Answer: | | 12 |

  | | | 6 |

  | | | 23 |

  | | | 46 |

  | | | 3

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  | Instructor Explanation: | Frequency for the “F” = Relative Frequency x Total Students = 0.06 x 200 = 12 |

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  | Points Received: | 0 of 4 |

  | Comments: | |

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 3. | Question : | A random sample of 12 joggers was asked to keep track and report the number of miles they ran last week. The responses are:

5.5  7.2  1.6  22.0  8.7  2.8  5.3  3.4  12.5  18.6  8.3  6.6

Compute the three statistics that measure central location. |

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  | Student Answer: | | Mean: 6.9, Median: 8.54 |

  | | | Mean: 6.9, Median: 9.64 |

  | | | Mean: 8.54, Median: 6.9 |

  | | | Mean: 7.2, Median: 8.12 |

  | | | Mean:...