Neparametarski statistički testovi primijenjeni na pokazatelje kakvoće vode

undergraduate thesis

• Title (english): Non-parametric statistical tests applied to water quality indicators
• Author: Karolina Antolković
• Mentor: Sanja Kovač (mentor)
• Mentor: Anita Ptiček Siročić (komentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Anita Ptiček Siročić (član povjerenstva)
• Committee member: Ivan Kovač (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2021-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Redovita ispitivanja bakterija i štetnih tvari su obavezna, pogotovo na mjestima
gdje se voda koristi za piće ili rekreaciju, kako bi se smanjile eventualne zaraze.
U svrhu dokazivanja prisutnosti mikrobioloških pokazatelja (Escherichie coli i
crijevnog enterokoka) provedeno je uzorkovanje i analiza vode na jezerima
Bundek i Jarun, tijekom tri godine, 2014. do 2016. Podaci su obrađivani
neparametarskim statističkim metodama. Korištena su dva testa: prošireni
medijan test i Kruskal-Wallis test. Kruskall- Wallisovim testom, u određenim
slučajevima, dobiva se detaljniji uvid u rezultate. Vrijednosti mikrobioloških
pokazatelja uzoraka uzimanih tijekom tri godine statistički se značajno
međusobno ne razlikuju. Testovima je dokazano da između pojedinih vrijednosti
medijana postoji samo mala razlika.

Abstract (english)

Regular testing of bacteria and harmful substances is mandatory, especially in
places where water is used for drinking or recreation, in order to reduce possible
infections. With the aim of proving the presence of microbiological indicators
(Escherichia coli and intestinal enterococci), sampling and analysis of water was
performed on Jarun Lake and Bundek lake, during three years, from 2014 to
2016. Data were processed by nonparametric statistical methods. Two tests were
used: the extended median test and the Kruskal-Wallis test. The Kruskal-Wallis
test, in some cases, provides a more detailed insight into the results. The values
of microbiological indicators of samples taken during the period of three years do
not vary significantly in terms of statistics. The tests have shown that there is only
a small difference between certain median values.
Key

• Keywords: neparametarski testovi; prošireni medijan test; Kruskal - Wallisov test; kakvoća vode; Escherichia coli; crijevni enterokok
• Keywords (english): nonparametric tests; extended median test; Kruskal-Wallis test; water quality; Escherichia coli; intestinal enterococci
• Language: croatian
• URN:NBN: urn:nbn:hr:130:483571
• Study programme: Title: Environmental Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/ baccalaurea) inženjer/ inženjerka inženjerstva okoliša (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/ baccalaurea) inženjer/ inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-10-27 07:20:32