Question: A sample is selected from a population with = 50. After a treatment is administered to the individuals in the sample, the mean is found

A sample is selected from a population with= 50. After a treatment is administered to the individuals in the sample, the mean is found to be M = 55 and the variance is s2= 64.

  • If the sample hasn= 16 scores, then conduct a hypothesis test to evaluate thesignificance of the treatment effect.
  • Calculate Cohen's d to measure the size of the treatment effect. Use a two-tailed test with= .05.

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