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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-11573</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/11573</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Без раздела</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Without section</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Factorial experiment in estimating the accuracy of average Ni and Co contents in laterites</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Факторный эксперимент при оценке точности среднего содержания Ni и Со в латеритах</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Klushin</surname>
            <given-names>I. G.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Клушин</surname>
              <given-names>И. Г.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Klushin</surname>
              <given-names>I. G.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"/>
          </aff>
          <aff>
            <institution xml:lang="en"/>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Krombet</surname>
            <given-names>K. A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Кромбет</surname>
              <given-names>К. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Krombet</surname>
              <given-names>K. A.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru"/>
          </aff>
          <aff>
            <institution xml:lang="en"/>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1974-02-01">
        <day>01</day>
        <month>02</month>
        <year>1974</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1974</year>
      </pub-date>
      <volume>64</volume>
      <issue>2</issue>
      <fpage>143</fpage>
      <lpage>149</lpage>
      <history>
        <date date-type="received" iso-8601-date="1973-08-07">
          <day>07</day>
          <month>08</month>
          <year>1973</year>
        </date>
        <date date-type="accepted" iso-8601-date="1973-10-04">
          <day>04</day>
          <month>10</month>
          <year>1973</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1974-02-01">
          <day>01</day>
          <month>02</month>
          <year>1974</year>
        </date>
      </history>
      <permissions>
        <copyright-statement>© I. G. Klushin, K. A. Krombet</copyright-statement>
        <copyright-year>1974</copyright-year>
        <copyright-holder xml:lang="ru">И. Г. Клушин, К. А. Кромбет</copyright-holder>
        <copyright-holder xml:lang="en">I. G. Klushin, K. A. Krombet</copyright-holder>
        <license xlink:href="http://creativecommons.org/licenses/by/4.0">
          <license-p>CC BY 4.0</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/11573">https://pmi.spmi.ru/pmi/article/view/11573</self-uri>
      <abstract xml:lang="ru">
        <p>1.При оценке доверительных пределов для средней концентрации ме­талла в руде учитывают данные о моментах распределения и числе проб. Важно иметь также представление о степени независимости раз­личий между определениями, так как обычное положение о том, что дисперсия среднего в n раз меньше дисперсии единичного определения справедливо только для определений с независимыми вариациями (n — число единичных определений).</p>
      </abstract>
      <abstract xml:lang="en">
        <p>1.In estimating confidence limits for the mean metal concentration in ore, data on the moments of distribution and the number of samples are taken into account. It is also important to have an idea of the degree of independence of differences between determinations, since the usual statement that the variance of the mean is n times less than the variance of a single determination is valid only for determinations with independent variations (n is the number of single determinations).</p>
      </abstract>
    </article-meta>
  </front>
  <body/>
  <back>
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        <mixed-citation xml:lang="ru">Krumbein W. C., Gгaуbill F. A. An Introduction to Statistical models in Geology. Me Graw Hill, N. Y., 1965.</mixed-citation>
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  </back>
</article>
