![]() ![]() If d is the gap between the upper limit of any class and the lower limit of the Succeeding class, the class bOundaries for any class are then given by : Upper class boundary The upper and lower class limits of the new aclusive type classes are known as class boundaries. Since the grouped frequency distribution is not continuous, we frrst convert it into a continuous distribution as follows: HISTOGRAM FOR FREQ. The histogram of the distribution of marks of250 students in Table 3 (page 2♲) is obtained as follows. Although the height of each rectangle is proportional to the frequency of the corresponding class, the height of a fraction of the rectangle is not proportional to the frequency of the correspOnding fraction of the class, so that histogram cannot be directly used to read frequency over a fraction of a class interval. If the grouped' frequency distribution is not continuous, fIrst it is to be converted into continuous disiribution and then the histrogam is drawn. over the interval x - hl2 to x + hl2, where h IS the Jump from one value to the next. ![]() To draw the histogram for an ungrouped frequency distribution of a variable we shall have to assume that the frequency correspon~ing to ~e variate value x is spread. ![]() 7be diagram of continuous rectaDgleS so obtained is called histrogram.įrequency Distributions And Measures or Central Tendency however, the classes are of Wlequal width then die height of the rectangle wili be proponional to the ratio of the frequencies to the width of the classes. ~' ortional to th~ frequency of the class. Tenth Revised Edition (Greatly Improved) '. Reader in Mathematics Shri Ram Coffege of Commerce University of Delhi Delhi GUPTA Reader in Statistics Hindu College, University of Delhi Delhi (Contains, besides complete theory, more than 650 fully solved examples and more than 1,500 thought-provoking Problems with Answers, and Objective Type Questions) FUNDAMENTALS OF MATHEMATICAL STATISTICS (A Modern Approach) A Textbook written completely on modern lines for Degree, Honours, Post-graduate Students of al/ Indian Universities and ~ndian Civil Services, Indian Statistical Service Examinations. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |