A researcher is interested in knowing whether male heroin addicts' assessments of self-worth differ from those of the general male population. On a test designed to measure assessment of self-worth, the mean score for males from the general population is 48.6. A random sample of 25 scores from heroin addicts yielded a mean of 44.1 and a standard deviation of 6.2. Do the data indicate a difference? Pearson correlation one-sample z one-sample t Osimple regression

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