摘要
In this paper we give a refinement of the Jensen inequality for any mid-convex functionfby arithmetic means offevaluated at arithmetic means of samples with repetitions. The case of samples without repetitions was treated by J. E. Pecaric and V. Volenec (Österreich. Akad. Wiss. Math.-Natur. Kl. Sonderdruck Sitzungsber.197, 1988, 463–467).