Statistics Solutions

[Solution] A random sample obtained from a population with a mean of µ=100. And a treatment is administered to the sample. After treatment, the sample mean

Question: A random sample obtained from a population with a mean of µ=100. And a treatment is administered to the sample. After treatment, the sample mean is found to be M=104 and the sample variance is s 2 =400.

  1. Assuming the sample contained n=16 individuals, measure the size of the treatment effect by computing the estimated d and r 2 .
  2. Assuming the sample contained n=25 individuals, measure the size of the treatment effect by computing the estimated d and r 2 .
  3. Comparing your answers from parts a and b, how does sample size influence measures of effect size?

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