1 Critical Value: Our sample has size of 30, and so there are 29 degrees of freedom. 2  The critical value for confidence level of 90% is given by t * = 1.699.3  Margin of Error: Now we use the margin of error formula and obtain a margin of error of t * s /â n = (1.699)(2) /â(30) = 0.620. Critical Value: Our sample has size of 30, and so there are 29 degrees of freedom. 2  The critical value for confidence level of 90% is given by t * = 1.699.
vasodilator as diltiazem. Minimum therapeutic plasma diltiazem concentrations appear to be in the range of 50 to 200 ng/mL. There is a departure from linearity when dose strengths are increased; the half-life is slightly increased with dose. A study that compared patients with
Diltiazem. Diltiazem is a prescription medication used for controlling high blood pressure and treating certain types of chest pain. The medication is a type of calcium channel blocker that helps to relax the blood vessels to improve blood flow. Diltiazem hydrochloride is a prescription medication used to treat high blood pressure (hypertension) and certain types of chest pain (angina). (Click Diltiazem Uses for more information on what it is used for, including possible off-label uses.)