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A pharmacologist measured the concentration of dopamine in the brains of several rats. The mean concentration was 1,269ng/g and the standard deviation was 145ng/g. Determine

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A pharmacologist measured the concentration of dopamine in the brains of several rats. The mean concentration was 1,269ng/g and the standard deviation was 145ng/g. Determine the 95% confidence interval if 1000 rats were tested. a. (1231.65, 1306.35) b. (1260.01, 1277.99) C. (1240.58, 1297 .42) d. (1257.19, 1280.81)

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