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79. if in a frequency distribution table classes one made like 0-9, 10-19 and 20-29. the grouping method is called ? (1) open class method (2) continuous method
79. If in a frequency distribution table classes one made like 0-9, 10-19 and 20-29. The grouping method is called ? (1) Open class method (2) Continuous method (3) Exclusive method (4) Inclusive method q fi aIRaTaT TRT HRui 7 Tri, 0-9, 10-19 TT 20-29 aI (1) 2 3Hf .(3) 9797ff aR (4) 80. 'Faur and Cross' method is used to calculate: 1) Mean (2) Frequencies (3) Median (4) Mode 1) T (2) 477TTAT 13) eze (4)
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Ashish sharma Best Answer
79 - option A To present such a large amount of data so that a reader can make sense of it easily, we condense it into groups like 0-9, 10-19,20-29, 30-39, . . ., 90-99. These groupings are called ‘classes’ or ‘class-intervals’, and their size is called the class-size or class width, which is 10 in this case. In each of these classes, the least number is called the lower class limit and the greatest number is called the upper class limit, e.g., in 20-29, 20 is the ‘lower class limit’ and 29 is the ‘upper class limit’.
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Ashish sharma![best-answer]()
80 option-B is correct,. We generally use tally bars to count the frequency in a series. Whenever an item occurs in a series, it is represented by a ‘|’. This is an item occurs 4 times then it is represented as ||||. One important point to remember is that we represent the fifth occurrence by crossing the four tally bars. This is the four and cross method.