Common z values - University of Kentucky



Common z values

|Confidence Level (%) |z value |

|90 |1.65 |

|95 |1.96 |

|96 |2.05 |

|97 |2.17 |

|98 |2.33 |

|99 |2.58 |

Factors for control limits of mean and range charts

|Sample Size |A2 |D3 |D4 |

|4 |0.73 |0 |2.28 |

|5 |0.58 |0 |2.11 |

|6 |0.48 |0 |2.00 |

|7 |0.42 |0.08 |1.92 |

|8 |0.37 |0.14 |1.86 |

|9 |0.34 |0.18 |1.82 |

|10 |0.31 |0.22 |1.78 |

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Total cost = Fixed cost + variable cost

Revenue = unit selling price x quantity

Control limits for x-bar charts:

Control limits for x-bar charts using sample range:

Control limits for range charts:

Control limits for proportion charts:

Control limits for count charts:

Process capability measures:

Utilization rates:

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Expected activity time =

Earliest start time = Max [Earliest finish time of all immediate predecessors]

Earliest finish time = Earliest start time + Activity time

Latest finish time = Min [Latest start time of all immediate successors]

Latest start time = Latest finish time - Activity time

σp =

Crash cost per time period =

The Standard Normal Distribution

This table gives the area under the standardized normal curve from 0 to z, as shown by the shaded portion of the following figure.

Examples: If z is the standard normal random variable, then

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| |

|z |

|0.0 |

|Source: Adapted from Robert Markland, Topics in Management Science, 3rd ed. New York: John Wiley & Sons, 1989. |

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