Basics

Tutorials on the basics of statistics in the Excel environment using Real Statistics website and free downloadable software.

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8 Responses to Basics

  1. osamah adel says:

    hi
    I have one variable which is function of four or five variables and I want to fined a relation between them using the statistic program
    and I have a data between the dependent variable and the independent variables
    so can you help me please ???

  2. Joan says:

    Hi Charles,
    I have a problem which seems easy but I can’t quite resolve.
    I have a survey which has categorical data, aiming to compare two groups where the general group has 56 respondents and the expert group has 6.
    I tried to use a Chi squared test on SPSS but more than 20% of my cells have an expected frequency of less than 5. Somehow I can’t see the Fishers exact test results and I understand it’s because data was not in a 2×2 form.
    What should I do? Chi square doesn’t work because the rules have been violated but there is no option for a Fishers exact test?

    Thanks for your advice!

    Joan

  3. Joan says:

    The row is “experts vs non experts”, while the columns are “age range” (1 for age 30-34, 2 for 35-39, 3 for 40-44 and so on until more than 70).

    • Charles says:

      Joan,
      I suggest that you use fewer age ranges. E.g. age 30-39, 40-49, 50-59, 60-69, 70 or more. In this case perhaps all cells will have values of 5 or more. With a 2 x 5 contingency table you can use Fisher’s Exact test (Real Statistics supports this).
      Charles

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