by mbalectures | May 30, 2010 | Descriptive statistics

Cumulative frequency distribution shows the number of observations which fall below or above in a given class interval. If the number of observations fall below in a given class interval then it is called less than cumulative frequency distribution. On the other hand...
by mbalectures | May 30, 2010 | Descriptive statistics

Frequency of a class divided by total frequency of all classes is called relative frequency. Relative frequency is expressed in terms of percentage therefore it is also known as percentage distribution. A table showing intervals with corresponding relative frequencies...
by mbalectures | May 30, 2010 | Descriptive statistics

Now we know about class interval, class limits, size of class interval, frequency distribution, class boundaries and mid class. On the basis of all these concepts, we are now able to construct a frequency distribution table with the help of problem A. Problem A:...
by mbalectures | May 30, 2010 | Descriptive statistics

Calculation of Class Boundaries Calculation of class boundaries for three class intervals can be illustrated with the help of following figure. The figure shows two methods for calculating the class boundaries. In the first method, class boundaries are calculated by...
by mbalectures | May 30, 2010 | Descriptive statistics

The arrangement of data according to magnitude or size is called a frequency distribution. It is the method of putting data into different groups which are called class intervals or simply classes. From the frequency distribution comes the concept of grouped data...