A random sample of n=25 individuals is selected from a population with a mean of 20 , and a treatment is administered to

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answerhappygod
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A random sample of n=25 individuals is selected from a population with a mean of 20 , and a treatment is administered to

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A random sample of n=25 individuals is selected from apopulation with a mean of 20 , and a treatment isadministered to each individual in the sample. After treatment, thesample mean is found to be sample mean = 22.2with a SS of 384. Based on these data, we want to know if thetreatment had any effect.Assume alpha of .05.
1. What was the critical value?2. What is the test statistic? Did you retain or reject thenull?3. Compute and interpret Cohen’s D.4. Compute the 95% confidence interval.
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