FREQUENCY, CLASS FREQUENCY AND TALLY BARS

Define the following terms: Observations (ii) Raw data Frequency of an observation Frequency distribution Discrete frequency distribution Grouped frequency distribution class-interval (viii) Class-size Class limits (x) True class limits

The marks scored by 20 students in a test are given below: 54,42,68,56,62,71,78,51,72,53,44,58,47,64,41,57,89,53,87,57. Complete the following frequency table: Marks in class intervals, Tally marks, Frequency (No. of children 40-50 50-60 60-70 70-80 80-90, , What is the class interval in which the greatest frequency occurs?

Introduction|| Collection OF Data||Primary and Secondary Data|| classes|| Class interval|| Class size ( range )|| Presentation OF Group data & Single data ( ungrouped data )||Tally mark||Frequency distribution table

From a frequency distribution, c = 3, l = 65 . 5 f = 42, m = 23, N = 102 then median is (l = lower limit of the median class, m= cumulative frequency of the class preceeding the median class, N = total frequency, f = frequency of the median class, c = width of the median class)

Define the following terms: (i) Observations (ii) Raw data (iii) Frequency of an observation (iv) Frequency distribution (v) Discrete frequency distribution (vi) Grouped frequency distribution (vii) class-interval (viii) Class-size (ix) Class limits (x) True class limits

While constructing the cumulative frequency column of a frequency distribution, it is noticed that these cumulative frequencies arein arithmetic progression. Assertion (A) : All the class frequencies are equal. Reason (R) : when all the class frequencies are equal, the cumulative frequencies are arithmetic progression.

State True or False : Cumulative frequency of the last class is the total of all frequencies in the data.