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4044 Uppsatser om Hypothesis testing and t-test - Sida 64 av 270

Motorik hos barn som går montessoriskola : En pilotstudie av elever på en montessoriskola i jämförelse med Skola, Idrott och Hälsa-projektet

AimThe aim of this essay is by using a motor skill track to see if there exists any remarkable difference in the motor skill profiles between pupils from our montessori school and the mean score in the "Nytidstest". The questions at issue we had were: How is the motor skill profile on pupils in year 2 and 3 practicing montessori pedagogy? Is the motor skill profile superior or inferior to the mean score in the "Nytidstest"? What factors, if any, concerning the montessori pedagogy affects the results of the test?MethodWe used a motor skill track consisting of 8 stations sellected from the "Nytidstest" adapted for year 3 (the original test consists of 16 stations). Pupils from year 2 and 3 in our chosen montessori school were tested in groups of 4-5 persons each. We made the tests on two occasions each lasting for 100 minutes at the time.

En utvärdering av två pearl growing-metoder i ISI Web of Science

The purpose of this thesis is to evaluate two pearl growing methods in ISI Web of Science. The methods tested are Find Related Records FRR, an automatic service that uses bibliographic coupling, and Author Keywords AK, where searches are performed using the two first keywords from this field. Both search methods were used on twenty initial documents and the first twenty hits were evaluated for relevance using a binary scale 0,1. The relevance criteria were based on specific information needs connected to every initial document. The measures used to evaluate the effectiveness of the search methods were Precision at DCV=10, P10, and Uninterpolated Average Precision AP.

Användarupplevelse av ett komplext infotainmentsystem i en bil. En verklighetsbaserad studie av gränssnittet mellan människa och fordon

In recent decades here has been a huge development in information technology (IT), where we humans are increasingly using IT in our daily lives, ranging from social media to music streaming services; this has also been a reflection of the technologies developed to our cars. Infotainment systems have become an increasingly regular feature in modern cars where the high degree of integration such as navigation, mobile and Internet has become more common and more sought after. Despite this, relatively little research problemized User Experience of a complex infotainment system in a car. This study thus has the intention to consider the relevance of reality based tests by examining how the user experiences a complex infotainment system in a car. We asked ourselves; How do the user experience a complex infotainment system in a car? We conducted our qualitative study, an interview with researchers in the field of vehicle and road safety and designed a number of system-related activities in a test session where we observed three users.

Att följa piskan eller hjärtat? : Partisammanhållningens utveckling i riksdagen efterpersonvalsreformens tillkomst

This thesis aims at studying the development of the party cohesion in the Swedish national parliament, riksdagen, after the introduction of preference voting in the election of 1998. The party cohesion has been measured during parliamentary sessions before and after the reform. The result of the cohesion during each of the sessions has then been compared towards each other. The cohesion was measured between the members of parliament viewed as a whole, and within the party groups during the different sessions. The research method being used has been a quantified statistical voting analysis, making the comparisons of party cohesion during the different parliamentary sessions as easy as possible.

Att arbeta som sjuksköterska med patienter med TBC : en litteraturstudie

Syftet med denna litteraturstudie var att beskriva sjuksköterskans arbete med patienter med TBC (tuberkulos) och sjuksköterskors uppfattningar av risker som de utsätts för i vårdarbetet i kontakten med patienter med TBC. Sökning av vetenskapliga artiklar gjordes i databaserna Medline via Pubmed, Science Direct, Swedmed + samt Cinahl. Studiens huvudresultat utgjordes av tre huvudkategorier; Ssk bidrag till minskad smittspridning, omvårdnad vid TBC och Sjuksköterskans risker i arbetet. Ekonomisk levnadsstandard samt utbildningsnivå visade sig ha stor betydelse för utbredningen av TBC. Det sociala umgänget är en viktig del i sjukdomsförloppet eftersom patienterna känner att nära och kära undviker dem.

Costa Ricas konsolidering : När konsoliderades Costa Ricas demokrati utifrån ett maximalistiskt perspektiv

This thesis aims to examine when democratic consolidation took place in Costa Rica from a maximalistic perspective. The hypothesis is that it?s likely that the democracy was not consolidated as early as 1953 which would be the case if applying a minimalistic perspective. Linz and Stepan?s theory about democratic consolidation has been chosen as the theoretical framework of the thesis and the research has been conducted by using a qualitative text analysis.

Återgivning av ordlistor presenterade med alternerande röster: En jämförelse mellan två återgivningsinstruktioner

In many earlier investigations a recall advantage of auditory lists spoken in a single voice has been found over recall of lists spoken in two alternating voices. One explanation proposed is an organization strategy which makes recall of alternating-voice lists so difficult. The strategy implies sorting same-voice words into same-voice groups at encoding. Based on this proposition, it was assumed that voice-by-voice recall would be better than recall in order of presentation, as then the recall instruction and the organization of items in memory would be in concordance. The present experiment tested and was unable to support this hypothesis.

Stålkonsumtion och ekonomisk utveckling i Kina: En ekometrisk analys

Det har länge varit känt att stålkonsumtionen har en stor betydelse för samhällsutvecklingen. En ökad stålkonsumtion betraktas ofta som en indikator på ekonomisk utveckling. Syftet med denna uppsats är att undersöka hur Kinas stålkonsumtion förhåller sig till den snabba ekonomiska utvecklingen och i vilken inriktning går sambandet, dvs. är det den ekonomiska utvecklingen som driver stålkonsumtionen eller vice versa. Undersökningen omfattar perioden mellan 1970 och 2011.

The potential of entomopathogenic fungal isolates as an environmentally friendly management option against Acanthoscelides obtectus

The bean bruchid, Acanthoscelides obtectus is a major threat to bean production. In Ethiopia, where this study was performed, the damage by bruchids on stored beans has been reported to reach up to 38%. To use the isolates Beauveria bassiana and Metarhizium anisopliae in the management of A. obtectus can be an environmentally safe alternative for controlling the pest. In the present work the aim was to examine if the four chosen fungal isolates, B.

Termisk hantering av litium-jon- batterier i elektriska drivsystem

The automotive market is currently undergoing a historical change where stricter emission legislations and ever increasing fuel costs have intensified the search for effective alternatives to the conventional internal combustion engine, which has resulted in a substantial trend towards electrification of powertrains. Storage of electrical energy is the fundamental component in this technology where the lithium-ion batteries are currently considered as the most appropriate solution. Lithium-ion batteries, however, as other types of batteries, can only be used efficiently and durably within a specific temperature range.This Master thesis has been carried out in collaboration with Electroengine in Sweden AB, situated in Uppsala, which has an ongoing project regarding development of a modular battery system for electric powertrains. The project is at a stage where an initial prototype has been developed which provides the foundation for this thesis. The study has addressed the battery system performance from a thermal perspective, in order to validate the ability of the system to create a thermally serviceable environment for the lithium-ion battery cells.

Koffeins påverkan på tårproduktionen

Syfte: Syftet med arbetet var att undersöka om ett intag av koffein kan påverka tårproduktionen med hjälp av Schirmer 1 test.Metod: I det här arbetet deltog 30 personer i åldrarna18 ? 28 år (medelåldern var 22,3 ± 2,1 år) som var uppdelade i två grupper med 15 personer i varje grupp. Den ena gruppen fick 200 ml vatten och 300 mg koffein och den andra fick bara 200 ml vatten. Alla deltagares tårproduktion mättes fyra gånger, en gång före intag, efter intag mättes tårproduktionen efter både 30, 60 och 90 minuter. Tårproduktionen mättes med hjälp av Schirmer 1 test, vilket är en pappersfilters remsa med en graderad mm-skala som hängs fast i deltagarens undre ögonlock, där den absorberar ögats tårar.Resultat: Det fanns ingen statistisk signifikant skillnad (p > 0,05) efter koffeinintag, men det fanns det efter vattenintag på höger öga där tårproduktionen minskning var statistiskt signifikant mellan första och sista mätningen (p = 0,011).Slutsats: Det fanns ingen statistisk signifikant skillnad (p > 0,05) efter koffeinintag.

Return Behavior of Initial Public Offerings and Market Efficiency

This paper is an event study on Initial Public Offering?s return behavior after the dot com bubble. Cumulative Abnormal Returns are used to measure the performance against a market index. The results suggest that the market correctly prices IPOs in the long run thus upholding the Market Efficiency hypothesis. Moreover, value weighted CARs show that large IPOs are more likely to outperform smaller IPOs, however in the long run there is an unpredictable pattern.

Att kommunicera naturvetenskap -om hur valet av testmetod påverkar elevers prestationer i naturvetenskapliga tester

Svenska elever deltar emellanåt i nationella och internationella undersökningar där deras naturvetenskapliga kunskaper testas. På vissa frågor i dessa undersökningar har svenska elever fått ett dåligt resultat, få elever gav ett naturvetenskapligt korrekt svar. Syftet med denna studie är att få en bättre förståelse för hur elever resonerar och handlar i en testsituation. Syftet är även att få en uppfattning om hur valet av testmetod och elevers begreppsförståelse påverkar deras prestationer i naturvetenskapliga test. Genom att, utifrån ett sociokulturellt perspektiv på lärande, samtala med elever har jag försökt se hur de resonerade kring naturvetenskapliga frågor.

En kartläggning av målvakters tränings- och matchmiljö inom Svensk elitfotboll

Purpose: The purposes of the current study were to investigate whether there were any differences in the perceptual ability between professional and non-professional ice-hockey players and whether professional players are better at distinguishing, paying attention to and concentrating on what is important during intense physical activity. Method: Twenty male ice-hockey players (10 from both the Swedish first and third divisions) participated in the study. Wingate test were used for physiological measurements while three psychological tests were presented in front of the participants. Stroop, Flanker and Fast counting tests were used to measure perceptual and coping abilities during intense physical activity and the differences between the two groups. Results: Fast counting and Flanker word 2 tests showed a significant difference between the two groups, whereby the professional groups was faster and more accurate than the non-professional group in answering.

Vinstvarningars påverkan på företag i Large och Small Cap? :  

Den här studien undersöker hur vinstvarningar påverkar stora och små företag. För att förklara dess påverkan på företagen har den effektiva marknadshypotesen och behavioral finance använts som grund. Avgränsningen har gjorts till Stockholmsbörsen då inga tidigare studier haft fokus på den. Empirin visar att företag i Large Cap påverkas med i snitt -4,63% och företagen i Small Cap med -8,42%. Large Cap visade signifikanta abnorma avkastningar under eventdatumet och dagen efter medan Small Cap endast visade signifikans under eventdatumet.

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