A psychologist is interested in knowing whether male heroin addicts' assessment of self worth differs from that of the general male population. On a test designed to measure assessment of self worth, the mean score for the males from the general population is 48.6. A random sample of 30 scores achieved by heroin addicts indicates a score of 44.1 and s = 6.2. Do the data indicate that the male heroin addicts value themselves less than the general population? Use  = 0.01.