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  1. E

    Psychometric sample size requirements

    Good afternoon, What is the guidance for psychometric sample size requirements? For instance, say I developed a psychometric tool to assess resilience with scores ranging from 0 to 100. Let’s say, the Los Angeles County Unified School District has agreed to use my tool to assess resilience...
  2. E

    Test of two proportions

    50% (50 out of 100 people) in Country X experience a heart attack over a 5 year period. 30 out of the 50 people experience a repeated heart attack in Country X. In State A of Country X, 20% (10 out of 50 people) experience a heart attack over the same 5 year period. 10 out of the 10 people...