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# Statistical Analysis Steps

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### Statistical Analysis Steps

1. 1. 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
2. 2. Data ‫ا‬ Variables Estimation Statistics
3. 3. Time series' data Cross-section data
4. 4. variables Quantitative variables
5. 5. Estimation stage
6. 6. 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
7. 7. variability Sample size Type of sample
8. 8. ‫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
9. 9. Null P.v>α Hypothesis -Z test -T test -F (ANOV A) test -X² test P.v≤α Alternative Hypothesis
10. 10. Varia b les Estimation Statistics Testing s lysi ation Ana sent Re pre &
11. 11. firstly secondly Statistical concepts Statistic use &meaningful thirdly Analysis & Representation
12. 12. Cross-section Data analysis is used to give a parsimonious summary of patterns of relations between variables in the survey dataset