Question

Collect some quantitative data (if your data from week 1 is quantitative, you can use it). Find the sample mean and standard deviation. Plot it in a histogram. Does the data seem to follow the bell curve of the normal distribution? What features of the data do or do not fit in with the shape of the normal curve. How much deviation from the curve is to be expected?

Answer #1

The data is:

Sales |

6904 |

8415 |

7999 |

1942 |

4713 |

7923 |

8034 |

7167 |

4557 |

6390 |

6556 |

5124 |

4275 |

1554 |

2083 |

8589 |

6742 |

1798 |

6911 |

8583 |

6064 |

7654 |

1578 |

8367 |

1750 |

6170 |

4968 |

2851 |

9181 |

7097 |

8610 |

8310 |

4808 |

5935 |

8272 |

3859 |

7585 |

8056 |

9733 |

6876 |

The sample mean and standard deviation are:

mean | 6,099.58 |

sample standard deviation | 2,398.88 |

The histogram is:

The data is slightly skewed to the left.

The deviation from the curve is expected to be 2398.88.

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Technology
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