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A researcher is interested in comparing the sample of inmates' level of impulsivity to the general population's average level.The researcher has both the sample mean

A researcher is interested in comparing the sample of inmates' level of impulsivity to the general population's average level.The researcher has both the sample mean (M = 33.49) and the population mean ( = 31.7) for the impulsivity test.The population standard deviation is = 2.75.Which test is correct, the single-sample t-test or the z-score test?Why?

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