Applied Statistics for Social and Management Sciences by Abdul Quader Miah

By Abdul Quader Miah

This ebook addresses the appliance of statistical options and strategies throughout quite a lot of disciplines. whereas its major concentration is at the program of statistical equipment, theoretical facets also are supplied as basic heritage details. It deals a scientific interpretation of effects usually came upon regularly descriptions of equipment and strategies comparable to linear and non-linear regression. SPSS can be utilized in all of the software points. The presentation of knowledge within the type of tables and graphs through the publication not just publications clients, but additionally explains the statistical program and assists readers in examining very important gains. The research of statistical facts is gifted continually through the textual content. educational researchers, practitioners and different clients who paintings with statistical facts will take advantage of studying utilized statistics for Social and administration Sciences.

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2. 1 Central Tendency 43 Fig. 1 Symmetrical distribution Fig. 2 Right-skewed distribution Fig. 3 Left-skewed distribution When the distribution is skewed to the left, Mean < Median < Mode. This is illustrated in Fig. 3. 2 Measures of Dispersion In the previous chapter, we have studied measures of central tendency. Although measures of central tendency are quite useful, a measure of central tendency, by itself, is not sufficient to provide an adequate summary of the characteristics of a dataset. For example, consider the following three sets of observations in income: 44 3 Descriptive Statistics xð$Þ yð$Þ zð$Þ 14; 000 4000 2000 17; 000 12; 000 10; 000 20; 000 20; 000 30; 000 23; 000 26; 000 28; 000 36; 000 38; 000 The mean of the income in all the three distributions is $20,000.

However, there are some important features in histograms. The blocks in histograms are placed together one after another. These are not separated. Classes are ordered on the horizontal axis, with scores increasing from left to right. Areas of the blocks are proportional to the frequencies. If the class intervals are of equal width, the heights of the blocks/rectangles are proportional to the frequencies. If the class intervals are of unequal width, the blocks/rectangles are drawn in such a way that the areas of the blocks/rectangles are proportional to the frequencies.

9 are used to construct the pareto chart shown in Fig. 10. 0 1986 1987 1988 1989 Year 1990 Fig. 5 Investment as a percentage of GDP. Data Source NESDB Thailand Population 2009 64 Years & Over %9 0-14 Years 21% 15-64 Years 70% Fig. 6 Thailand population (2009). Data Source National Statistical Office Fig. 7 Thai labor force by occupation. Data Source National Statistical Office 22 2 Presentation of Statistical Data Fig. 8 Crushing strength of bricks (histogram) Histogram Frequency 35 Frequency 30 25 20 15 10 5 0 30 0 0 28 0 26 0 22 0 20 0 18 0 16 14 12 0 0 Crushing Strength of Bricks (PSI) Fig.

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