Mean
Mean is the arithmetic average. To find mean of ungrouped data and it is obtained by adding the raw scores and dividing the sum by the number of items. There are three methods to find mean for a frequency distribution. (i) Direct method, (ii) Short-cut method, ..
Introduction
The scientific methods of collection of data, its classification and application to commerce and everyday life is called statistics. A list of some important terms as follows: (i) ungrouped data (ii) tabulation of data (iii) range (iv) frequency (v) fre..
Discrete Variables
A discrete variable can assume only integral values which can be counted. Number of pupils in a school, persons working in a factory are examples of discrete variables. A list of some important terms is given below. (i) ungrouped data (ii) tabulation of data (iii) ran..
Frequency Distribution
Frequency Distribution - A teacher gave a test to a class of 26 students. The maximum mark is 5. The marks obtained by the pupils are: Such data as above is called ungrouped (or raw) data. We may arrange the marks in ascending or descending order. The data so..
Frequency Distribution - A teacher gave a test to a class of 26 students. The maximum mark is 5. The marks obtained by the pupils are: Such data as above is called ungrouped (or raw) data. We may arrange the marks in ascending or descending order. The data so..How to find Mean Deviation!
Mean Deviation - The mean deviation of a statistical data is defined as the arithmetic mean of the numerical values of the deviations of items from some average value. Mean deviation is also known as average deviation . The mean deviation is generally denoted by M.D. Formula for mean devi..
Mean Deviation - The mean deviation of a statistical data is defined as the arithmetic mean of the numerical values of the deviations of items from some average value. Mean deviation is also known as average deviation . The mean deviation is generally denoted by M.D. Formula for mean devi..Class mid-mark or Class mark
) The class mark or mid point of class is Sometimes class marks rather than classes are given for a frequency table. Consider the case: By observing the class marks 13, 18, 23, it is obvious that the class interval is 5. Therefore, classes can be obtained as in Table (a) 11 - 15, 16 - 20, Or Table ..
) The class mark or mid point of class is Sometimes class marks rather than classes are given for a frequency table. Consider the case: By observing the class marks 13, 18, 23, it is obvious that the class interval is 5. Therefore, classes can be obtained as in Table (a) 11 - 15, 16 - 20, Or Table ..See what our Users say :
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