Abdul Quader Miah (auth.)'s Applied Statistics for Social and Management Sciences PDF

By Abdul Quader Miah (auth.)

ISBN-10: 1441451471

ISBN-13: 9781441451477

ISBN-10: 2152152182

ISBN-13: 9782152152189

ISBN-10: 9811003998

ISBN-13: 9789811003998

ISBN-10: 9811004013

ISBN-13: 9789811004018

This e-book addresses the applying of statistical options and strategies throughout a variety of disciplines. whereas its major concentration is at the program of statistical equipment, theoretical elements also are supplied as basic history info. It bargains a scientific interpretation of effects usually found quite often descriptions of equipment and strategies similar to linear and non-linear regression. SPSS can also be utilized in all of the program elements. The presentation of information within the type of tables and graphs through the publication not just courses clients, but in addition explains the statistical program and assists readers in reading vital good points. The research of statistical info is gifted regularly in the course of the textual content. educational researchers, practitioners and different clients who paintings with statistical info will reap the benefits of studying Applied statistics for Social and administration Sciences.

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Example text

The difference is only that we need to find the midpoint of the classes and assume that all the observations in the class are centered on the midpoint or are perfectly symmetrical about the midpoint. Since this assumption will not be 100 % valid in almost all practical cases, the mean calculated using this method will be approximate. The formula for mean when frequency distribution is given for grouped data is as follows: ¼ X P mi fi n where mi midpoint of ith class fi frequency of ith class n total number of cases.

If n is odd, the middle value is one. So position of Md is at (n + 1)/2. If n is even, there are two mid-values. Md lies halfway in between these two values. Examples 9 The following two sets of observations (ungrouped) show how to calculate the median. 1 Central Tendency 39 (continued) (1) (2) 525 608 719 1090 2059 4000 6000 No. of cases = 9 Md = 719 525 608 719 1090 2059 4000 No. 5 When the observations/measurements are given in classes, we need to use the following formula to calculate the median.

Interpret the results. 2:4 A quality control manager obtained samples to check the number of defective products. The number of defective products noted was as follows: 4 7 5 8 7 8 3 7 6 4 13 3 10 2 7 3 8 11 16 12 10 12 5 8 12 7 15 6 2 16 14 6 16 10 12 7 7 5 5 7 12 11 13 15 20 9 3 6 4 6 5 14 4 9 12 4 7 12 14 5 7 9 5 9 6 17 19 12 11 8 10 9 Group the data. Construct a histogram. Draw the frequency polygon. Comment on the distribution. 2:5 Electrical power demand in Dhaka was noted in two sample occasions—one in winter and the other in summer.

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Applied Statistics for Social and Management Sciences by Abdul Quader Miah (auth.)

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