Lithium. Lithium carbonate is a drug used to treat bipolar mental disorders. The average dose in well-maintained patients is 1.3 mEq/L with standard deviation 0.3 mEq/L. A random sample of 25 patients on lithium demonstrates a mean level ( ) of 1.4 mEq/L. Test to see whether this mean is significantly higher than that of a wellmaintained patient population. Use a two-sided alternative hypothesis for your test. Show all hypothesis testing steps. Comment on your findings.