3] = for frequency distribution Ef, = 60 and
Ef¹x = 1260 then the mear
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Answer:
11th
Economics
Collection of Data
Collecting and Grouping Data
Prepare the frequency distr...
STATISTICS
Prepare the frequency distribution table for the given set of scores:
39,16,30,37,53,15,16,60,58,26,28,19,20,12,14,24, 59,21,57,38,25,36,24,15,25,41,52,45,60,63,18,26,43,36,18,27,59,63,46,25,33,46,42,48,35,64,24.Take class intervals as (10−20),(20−30),.... and answer the following:
(i) What does the frequency corresponding to the third class interval mean?
(ii) What is the size of each class interval? Find the midpoint of the class interval 30−40.
(iii) What is the range of the given set of scores?
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ANSWER
Class Interval
Frequency
10-20
20-30
30-40
40-50
50-60
60-70
10
12
7
7
8
3
(i) For Cumulative Frequency 30−40 frequency is 7
(ii) Size is 11
Mid point for cumulative frequency 30−40 is 35.
(iii) Range =70−10=60