Recent content by Jimbobalot

  1. J

    Wellbeing Survey - Sample Size to identify minimum 2% effect size

    What do you mean by instrument? The 2% increase is just based on a wish to show the efficacy of the new measure. I don't understand the use of a 'two time point'?
  2. J

    Wellbeing Survey - Sample Size to identify minimum 2% effect size

    10/11 questions are a seven-point scale and 1 question is open-ended. I need to find out how many individuals should be sampled so that the measure can discriminate interventions that increase the proportion of people reporting very high life satisfaction by at least 2%. Previously it was 30%...
  3. J

    Wellbeing Survey - Sample Size to identify minimum 2% effect size

    Hi I am currently trying to determine a suitable sample size to detect AT LEAST a 2% increase in high levels of life satisfaction. The survey is on wellbeing and is made up of 10 scale questions (0-10) and 1 open-ended question. The current sample size I have determined is around 8571 (80%...