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Normal and lognormal distribution

  1. Dec 7, 2004 #1
    Could someone explain to me the simple rules of adding subtracting multiplying dividing Normal and lognormal distributions?

    My profs notes are very messy and it's really hard to keep up w/ also the supplied book was published in 1964 w/ no updates. Possibly a site?

    I just need simple rules to follow which will make it easier for me to solve. thanks again
  2. jcsd
  3. Dec 7, 2004 #2
    also how statistical independence plays a role in adding and subtracting two or more stdev and mean
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