A researcher begins with a known population-in this case, scores on a standardized test that are normally distributed with µ = 82.3 and σ = 15. The researcher suspects that special training in reading skills will produce an increased change in the scores for the individuals in the population. Because it is not feasible to administer the treatment (the special training) to everyone in the population, a sample of n=25 individuals is selected, and the treatment is given to this sa
A researcher begins with a known population-in this case, scores on a standardized test that are
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