Table A-1.--Sample size (n) from formula for mean L, for ...



Table A1-1.--Sample size (n) from formula [pic] for mean ±L, for 95% confidence limits.

|L |L | | | | |Standard deviation [pic] | | | | |L |L |

| | |1.0 |1.25 |1.5 |1.75 |2.0 |2.5 |3.0 |3.5 |4.0 |4.5 |5.0 |6.0 |7.0 |8.0 |9.0 |10.0 | | |

| | |.10. |.125 |.15 |.175 |.20 |.25 |.30 |.35 |.40 |.45 |.5 |.6 |.7 |.8 |.9 |1.0 | | |

|0.10 |0.010 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.010 |0.10 |

|0.125 |0.0125 |250 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.0125 |0.125 |

|0.15 |0.015 |175 |270 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.015 |0.15 |

|0.175 |0.0175 |130 |200 |290 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.0175 |0.175 |

|0.20 |0.020 |99 |155 |220 |300 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.020 |0.20 |

|0.25 |0.025 |64 |99 |145 |195 |250 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.025 |0.25 |

|0.30 |0.030 |46 |70 |99 |135 |175 |270 |400 |.. |.. |.. |.. |.. |.. |.. |.. |.. |0.030 |0.30 |

|0.35 |0.035 |34 |49 |73 |99 |130 |195 |290 |400 |.. |.. |.. |.. |.. |.. |.. |.. |0.035 |0.35 |

|0.40 |0.040 |27 |40 |57 |76 |99 |155 |220 |300 |400 |.. |.. |.. |.. |.. |.. |.. |0.040 |0.40 |

|0.45 |0.045 |22 |33 |46 |61 |79 |121 |175 |240 |320 |400 |.. |.. |.. |.. |.. |.. |0.045 |0.45 |

|0.5 |0.05 |18 |27 |38 |50 |64 |99 |145 |195 |250 |320 |400 |.. |.. |.. |.. |.. |0.05 |0.5 |

|0.6 |0.06 |14 |20 |27 |36 |46 |70 |99 |135 |175 |220 |270 |400 |.. |.. |.. |.. |0.06 |0.6 |

|0.7 |0.07 |11 |15 |21 |27 |34 |52 |73 |99 |130 |165 |200 |290 |400 |.. |.. |.. |0.07 |0.7 |

|0.8 |0.08 |9 |12 |16 |21 |27 |40 |57 |76 |99 |124 |155 |220 |300 |400 |.. |.. |0.08 |0.8 |

|0.9 |0.09 |8 |10 |14 |17 |22 |33 |46 |61 |79 |99 |121 |175 |240 |320 |400 |.. |0.09 |0.9 |

|1.0 |0.10 |7 |9 |12 |15 |18 |27 |38 |50 |64 |81 |99 |145 |195 |250 |320 |400 |0.10 |1.0 |

|1.25 |0.125 |5 |7 |9 |11 |13 |18 |25 |33 |42 |53 |64 |91 |123 |160 |210 |250 |0.125 |1.25 |

|1.5 |0.15 |5 |6 |7 |8 |10 |14 |18 |24 |30 |38 |46 |64 |87 |112 |145 |175 |0.15 |1.50 |

|1.75 |0.175 |4 |5 |6 |7 |8 |11 |14 |18 |23 |28 |34 |48 |64 |83 |105 |130 |0.175 |1.75 |

|2.0 |0.20 |4 |4 |5 |6 |7 |9 |12 |15 |18 |22 |27 |38 |50 |64 |81 |99 |0.20 |0.20 |

|2.5 |0.25 |3 |4 |4 |5 |5 |7 |9 |11 |13 |15 |18 |25 |33 |42 |53 |64 |0.25 |2.5 |

|3.0 |0.30 |2 |4 |4 |4 |5 |6 |7 |8 |10 |12 |14 |18 |24 |30 |38 |46 |0.30 |3.0 |

|3.5 |0.35 |2 |3 |4 |4 |4 |5 |6 |7 |8 |9 |11 |14 |18 |23 |28 |34 |0.35 |3.5 |

|4.0 |0.40 |2 |3 |3 |4 |4 |4 |5 |6 |7 |8 |9 |12 |15 |18 |22 |27 |0.40 |4.0 |

|4.5 |0.45 |2 |3 |3 |3 |4 |4 |5 |5 |6 |7 |8 |10 |12 |16 |18 |22 |0.45 |4.5 |

|5.0 |0.5 |2 |3 |3 |3 |3 |4 |4 |5 |5 |6 |7 |9 |11 |13 |15 |18 |0.5 |5.0 |

|6.0 |0.6 |2 |3 |3 |3 |3 |4 |4 |4 |5 |5 |6 |7 |8 |10 |12 |14 |0.6 |6.0 |

|7.0 |0.7 |2 |3 |3 |3 |3 |3 |4 |4 |4 |5 |5 |6 |7 |8 |9 |11 |0.7 |7.0 |

|8.0 |0.8 |2 |3 |3 |3 |3 |3 |3 |4 |4 |4 |4 |5 |6 |7 |8 |9 |0.8 |8.0 |

|9.0 |0.9 |2 |3 |3 |3 |3 |3 |3 |3 |4 |4 |4 |5 |5 |6 |7 |8 |0.9 |9.0 |

|10.0 |1.0 |2 |3 |3 |3 |3 |3 |3 |3 |3 |4 |4 |4 |5 |5 |6 |7 |1.0 |10.0 |

Determination of sample size requires a preliminary estimate of s, and a decision as to an acceptable value of L.

(Footnotes to table on reverse side apply to the above table also.)

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