Búsqueda

Sample size formulae for estimating the true arithmetic or geometric mean of lognormal exposure distributions

<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
  <record>
    <leader>00000nab a2200000 i 4500</leader>
    <controlfield tag="001">MAP20071022840</controlfield>
    <controlfield tag="003">MAP</controlfield>
    <controlfield tag="005">20080418120749.0</controlfield>
    <controlfield tag="007">hzruuu---uuuu</controlfield>
    <controlfield tag="008">950628e19950301usa||||    | |00010|eng d</controlfield>
    <datafield tag="040" ind1=" " ind2=" ">
      <subfield code="a">MAP</subfield>
      <subfield code="b">spa</subfield>
    </datafield>
    <datafield tag="084" ind1=" " ind2=" ">
      <subfield code="a">872</subfield>
    </datafield>
    <datafield tag="100" ind1="1" ind2=" ">
      <subfield code="0">MAPA20080045432</subfield>
      <subfield code="a">Hewett, Paul</subfield>
    </datafield>
    <datafield tag="245" ind1="1" ind2="0">
      <subfield code="a">Sample size formulae for estimating the true arithmetic or geometric mean of lognormal exposure distributions</subfield>
      <subfield code="c">Paul Hewett</subfield>
    </datafield>
    <datafield tag="520" ind1=" " ind2=" ">
      <subfield code="a">The purpose of this article is to present simple formulae for calculating the appoximate sample size required to estimate either the true arithmetic or true geometric mean of a lognormal distribution to within a specified accuracy with a specified level of confidence. These formulae should be of interest to the industrial hygienist involved in prospective or cross-sectional studies, or establishing exposure databases to be used to assess long-term changes in worker health status</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080585679</subfield>
      <subfield code="a">Higiene industrial</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080560850</subfield>
      <subfield code="a">Toxicología</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080619480</subfield>
      <subfield code="a">Enfermedades profesionales</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080565541</subfield>
      <subfield code="a">Epidemiología</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080592042</subfield>
      <subfield code="a">Modelos matemáticos</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080554286</subfield>
      <subfield code="a">Estimación</subfield>
    </datafield>
    <datafield tag="740" ind1="0" ind2=" ">
      <subfield code="a">American Industrial Hygiene Association journal</subfield>
    </datafield>
    <datafield tag="773" ind1="0" ind2=" ">
      <subfield code="t">American Industrial Hygiene Association journal</subfield>
      <subfield code="d">Akron, Ohio</subfield>
      <subfield code="g">Vol. 56, nº 3, March 1995 ; p. 219-225</subfield>
    </datafield>
  </record>
</collection>