Question

1. Explain the concepts of:
(i) Class interval,
(ii) Individual series,
(iii) Frequency array, and
(iv) Frequency distribution.​

Answer 1

Answer:

Definition Of Class Interval

While arranging large amount of data instatistics, they are grouped into different classes to get an idea of the distribution, and the range of such class of data is called the Class Interval.

Individual Series: Individual Series is a statistical series in which the all the observations are listed out and all the observations have a frequency of 1. For eg: 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 1,2,3,4,5,6,7,8 1,2,3,4,5,6,7,8 is an Individual Series.

The frequency of an element can be counted using two loops. One loop will be used to select an element from an array, and another loop will be used to compare the selected element with the rest of the array. Initialize count to 1 in the first loop to maintain a count of each element.

A frequency distribution is a representation, either in a graphical or tabular format, that displays the number of observations within a given interval. The interval size depends on the data being analyzed and the goals of the analyst. The intervals must be mutually exclusive and exhaustive