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32 M.C. Diaconu

> frecv = c(25, 11, 11, 11, 20, 20, 14, 16, 18, 21, 21, 21, 19, 23, 17, 24, 25, 12, 12, 15,
19, 19, 14, 22, 22, 24, 24, 24, 15, 17, 19, 18, 16, 20, 25, 23, 21, 22, 24, 20,
23, 25, 23, 15, 17, 22, 24, 20, 15, 19, 23, 25, 23, 15, 17, 19, 23, 17, 24, 25,
15, 15, 15, 14, 11, 18, 21, 21, 21, 19, 23, 17, 24, 20, 20, 14, 16, 18, 21, 21,
23, 12, 12, 10, 15, 12, 19, 19, 20, 24, 23, 23, 22, 24, 20, 15, 19, 23, 25, 23)

> hist(frecv)

Fig. 4

De asemenea, observ˘am c˘a punctajele obt , inute la concursul ,,Cangurul” nu respect˘a repartit , ia
normal˘a. Repartit , ia normal˘a este de as , teptat s˘a apar˘a doar la seriile statistice cu un num˘ar
mare de date.
Materialul prezentat se adreseaz˘a utilizatorilor ˆıncep˘atori ai limbajului de programare R.
Este important de precizat ˆıns˘a c˘a programul R poate fi utilizat ˆın mai multe domenii ale
matematicii aplicate, nu numai ˆın statistic˘a.

Bibliografie

[1] Maria Miroiu, Viorel Petrehus , , Gheorghit , ˘a Zb˘aganu, Init ,iere ˆın R, 2013.

[2] Mihaela Singer, Cristian Voica, Matematic˘a M5: manual pentru clasa a XI-a, Editura
SIGMA, 2006.

[3] Olariu St. Emanuel Florentin, https://profs.info.uaic.ro/ olariu/.
˜
[4] https://cran.r-project.org/doc/contrib/Paradis-rdebuts_RO.pdf