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5th Edition

Saeed Moaveni

Publisher: Cengage Learning

ISBN: 9781305084766

Chapter 19, Problem 8P

Textbook Problem

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Screw Length (cm) |
Pipe Diameter (in.) |

2.55 | 1.25 |

2.45 | 1.18 |

2.55 | 1.22 |

2.35 | 1.15 |

2.60 | 1.17 |

2.40 | 1.19 |

2.30 | 1.22 |

2.40 | 1.18 |

2.50 | 1.17 |

2.50 | 1.25 |

Determine the average, variance, and standard deviation for the following parts. The measured values are given in the accompanying table.

To determine

Calculate the mean, standard deviation, and variance for the given measured values.

**Given data:**

The given measured values of screw length and pipe diameter are shown below.

Screw Length (cm) | Pipe diameter (in.) |

2.55 | 1.25 |

2.45 | 1.18 |

2.55 | 1.22 |

2.35 | 1.15 |

2.6 | 1.17 |

2.4 | 1.19 |

2.3 | 1.22 |

2.4 | 1.18 |

2.5 | 1.17 |

2.5 | 1.25 |

The total number of measured values,

**Formula used:**

From equation 19.1 in the textbook, the formula to find mean for any sample is,

Here,

From equation 19.5 in the textbook, the formula to find the variance is,

From equation 19.6 in the textbook, the formula to find standard deviation is,

**Calculation:**

**Calculation for Screw length:**

Substitute all the value of screw length for

Substitute all the value of screw length for

Substitute all the value of screw length for

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

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