Statistical  Analysis Steps
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Statistical Analysis Steps

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    Statistical  Analysis Steps Statistical Analysis Steps Presentation Transcript

    • Principles & steps of Statistical Analysis ‫ا‬ ‫ا‬ ‫تو ا‬ ‫ا‬ Dr. Eyas . G . A .Rahim ‫ا‬ ‫د. ا س‬ 2/7 /2007 School of Economics Sharq Elnile University Sudan Dr.eyas.gaffar@gmail.com eyazza2006@yahoo.com
    • Data ‫ا‬ Variables Estimation Statistics
    • Time series' data Cross-section data
    • variables Quantitative variables
    • Estimation stage
    • d=z or t*SE d=z or t* σ/√n margin of error d Level of confidence Z or t Standard error SE Standard deviation σ Sample size n So t w o factors determining t he margin of error are: 1- Variability 2- sample design
    • variability Sample size Type of sample
    • ‫ا‬statistics statistics Mean Proportion Standard Deviation Mode Frequency table - Variance cross tabulation Range C hi-square - correlation coefficient ® determination coefficient (R2 Graphs Graphs Histogram Bar chart Normal curve Pie chart Scatter plot SPSS
    • Null P.v>α Hypothesis -Z test -T test -F (ANOV A) test -X² test P.v≤α Alternative Hypothesis
    • Varia b les Estimation Statistics Testing s lysi ation Ana sent Re pre &
    • firstly secondly Statistical concepts Statistic use &meaningful thirdly Analysis & Representation
    • Cross-section Data analysis is used to give a parsimonious summary of patterns of relations between variables in the survey dataset