Morettin Bussab Estatistica Basica 6ª edicao joseliza Amadeu. Uploaded by. joseliza Amadeu. Download with Google Download with Facebook. Bussab, W.O. and Morettin, P.A. () Estatística básica. 5th Edition, Saraiva, Sao Paulo. has been cited by the following article: TITLE: Climatic Variations and . Request PDF on ResearchGate | Basic Statistics (Estatistica Basica, The Student t test (Morettin & Bussab, ) was used to check for possible statistically.
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No base fertilization and coverage for any culture were used. Variables evaluated in C. Green manure brings numerous benefits that promote essentially the maintenance and conservation of agro-systems, and its implementation is fundamental to Brazilian Cerrado region.
The bkssab, in addition to providing similar benefits to other species, have the ability to accumulate N through biological fixation Silva et al. Although the data can produce reliable results in a given study, it is important to determine the sample size in order to estimate the average of each variable, with high confidence and a given estimation error.
The Cerrado occupation has occurred quickly, based on intensive production systems, which have increased the processes of soil degradation Silva et al. Forty five plants were randomly selected in the experimental area of each crop to determine fresh mass, dry mass and yield. Moreover, the statistical values revealed existence of genetic variability among C. In this scenario, the present research aimed to determine the sample size for the estimation of biomass and productivity expected values of Canavalia ensiformis and Dolichos lablab.
Among the desirable characteristics for selection of species for green manure, stands out mainly dry mass production, because it is related to the capacity to increase nutrient by symbiosis with microorganisms, soil cover and recycling of nutrients Chaves and Calegari, At maturation, 45 plants were randomly selected in the experimental area of each crop to determine fresh mass, dry mass and productivity.
Thus, the objective of this research was basicx determine the sample size to estimate biomass and productivity of C. Given these considerations baaica relation to normality, it can be inferred that the data from these variables provide credibility to the scaling of the sample size study.
Teodoro 1Larissa P. However, according to the central limit theorem, even if the basic population is not normal, the distribution of the sample mean will be approximately normal for samples greater than 30 observations Fonseca and Martins, ; Bussab and Morettin, The sample size is directly proportional to the variability of the variables under study and to the desired confidence degree in the estimate and inversely proportional to the estimation error allowed, initially established by the researcher Bar-betta et al.
Canavalia ensiformi showed significant higher values for the mean fresh mass production, dry mass and productivity in relation to Dolichos lablabbeing recommended for cultivation in Brazilian Cerrado.
Sample size to estatiatica the average of each character in C.
These estatistic confirm the variability among the variables and among green manure species, corroborating the results obtained by Cargnelutti Filho et al. Porto Alegre, Bookman, p.
These results showed lower magnitude than those observed by Omrettin that in mlrettin the fresh and dry mass production in different green manures did not identify statistical difference in the C. From a practical standpoint, it can be inferred that it is difficult to obtain average estimates of the variables evaluated in C. However, other factors must be analyzed for planning experiments with these green manures, such as seed germination, plant density, spacing to be used and type of harvesting and weeding manual or mechanical.
Estatística Básica – Morettin e Bussab | Rodolfo Nunes –
It does not fit in this study the judgment of maximum estimation error acceptable, getting the use this information to the researcher for his experimental design. It is important to mention that given the observed results, the jack bean provides greater dry mass production and consequently greater soil cover in relation to D.
Como citar este artigo. Measures of central tendency, variability, asymmetry and kurtosis were calculated and normality of the variables under study was checked by the Lilliefors test. The spacing used was 0.
BUSSAB E MORETTIN Estatística Básica 6a Edição ( 1)
The calculation of central tendency, variability, asymmetry, kurtosis and Lilliefors test relatively to morphological variables fresh mass, dry mass and C. Embrapa Cerrados, esattistica p. In agricultural systems in areas of Cerrado are used intercropped with maize and perennial crops, because tolerates partial shade Carvalho and Amabile, Densidades de semeadura de leguminosas na melhoria da qualidade do solo e na produtividade do milho.
According to Teodoro et al. Analyzing the variation coefficient of both green manures verifies a superior magnitude of fresh and dry masses and productivity, suggesting the need of higher sample sizes for the estimation of the fresh and dry mass relative to average productivity.
Conclusions Canavalia ensiformi showed significant higher values for the mean fresh mass production, dry mass and productivity in relation to Dolichos lablabbeing recommended for cultivation in Brazilian Cerrado.
In the Cerrado of Central Brazil is sown until the end of the rainy season, because of drought resistance and little sensitivity to photoperiod Calegari et al. Moreover, this is a crop that can be considered for family farms because of its moretttin seed production and high prices in the market. Among the various botanical families species that can be grown as green manures, stand out those of the Fabaceae family.
Considering these same parameters for the D. Results and Discussion The calculation of central tendency, variability, asymmetry, kurtosis and Lilliefors test estatisica to morphological variables fresh mass, dry mass and C. Data were extrapolated to t ha -1and measures of central tendency, variability, asymmetry and kurtosis were calculated and normality of the variables under study was checked by Lilliefors test Campos,