FUNDAMENTAL STATISTICS

May 19th, 2015
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INTRODUCTION : The concept of statistics is introduced in this topic. It covers the definition and the application of statistics involving type of data (grouped and ungrouped data), measures of central tendencies and measures of dispersion.

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UNIT 4FUNDAMENTAL STATISTICS4.1 Introduction The concept of statistics is introduced in this topic. It covers the definition and the application of statistics involving type of data (grouped and ungrouped data), measures of central tendencies and measures of dispersion.ObjectivesAt the end of the topic, you will be able to:Differentiate between grouped data and ungrouped dataConstruct grouped data from the given ungrouped data. Calculate the measures of central tendencies (mean, mode and median) for grouped and ungrouped data.Calculate the measures of dispersion (range, variance, standard deviation and coefficient of variation) for grouped and ungrouped data.4.2 Type of Data : Grouped and Ungrouped 4.2.1 Ungrouped DataUngrouped data is a raw data which are not in the form of table. For example: The number of visitors to the museum per day:78, 45, 65, 67, 132, 78, 67, 79, 85, 98, 112,123, 142, 1224.2.2 Grouped Data Grouped data is data which are organized and summarized in the form of table. A tabular arrangement of data by class intervals together with the corresponding class frequencies is called grouped data, or frequency table. Table 4.1 is a frequency table of weights in kg of 70 students at MN University.Table 4.1 Weights of 64 student at MN UniversityWeight (kg)Number of students45.0 - 49.950.0 - 54.955.0 -59.960.0 - 64.965.0 - 69.9410152015General Rules for Forming Grouped Data;1. Determine the number of c

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