Top nicardipine Related Articles. 1  amlodipine Amlodipine besylate (Norvasc) is a drug that belongs to the drug class of calcium channel blockers (CCBs), and is prescribed for the treatment and prevention of angina (heart or chest pain) that results from coronary spasm and from exertion.
By age 3 or 4 years, most children are able to cooperate for subjective visual acuity testing using an eye chart. If a child is unable to cooperate for visual acuity testing at age 3, a second attempt should be made within 6 months, if the child is age 4, a second attempt should be made within one month.
Discussion. When measures from the two samples being compared do not come in matched pairs, the independent-measures t-test should be used. When there are multiple samples, then ANOVA should be used. Goodness-of-fit curve-fitting is also available in more sophisticated forms where you have parametric data.