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12. are considered as defective then what present at lenses in the sumpo du un The following data indicate records at hospital. 1 10 2 3 4 5 1 5 2 2 10 7 3 5 4 24 8 5 3 1962 Find the mediam stay. Futher covert this information in a continous frequency distri (inclusive type) by taking classes of equal length starting from 1-3. Find the median from the frequency distribution and compare it with your eariler answer. momod hu 2 Rows in a class in 57. The mean of marks at all 60 students of

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Q1
Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
1623512584810341228151176328596871412
(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5- 10.
[2 MARKS]
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Q2

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
1623512584810341228151176328596871412
(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5- 10. [2 MARKS]

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Q3

The marks obtained by 40 students of a class in an examination are given below.
3, 20, 13, 1, 21, 13, 3, 23, 16, 13, 18, 12, 5, 12, 5, 24, 9, 2, 7, 18, 20,3,10, 12, 7, 18, 2, 5, 7, 10, 16, 8, 16, 17, 8, 23, 24, 6, 23, 15.
Present the data in the form of a frequency distribution using equal class size, one such class being 10-15 (15 not included).


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Q4
The following data gives the marks of 20 students in Mathematics (X) and statistics (Y), each out of 10, expressed as (x, y). Construct an ungrouped frequency distribution, considering single numbers as a class:
(2, 7), (3, 8), (4, 9), (2, 8), (5, 6), (5, 7), (4, 9), (3, 8), (4, 8), (2, 9), (3, 8), (4, 8), (5, 6), (4, 7),
(4, 7), (4, 6), (5, 6), (5, 7), (4, 6), (5, 5).
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Q5
In Q.3 part (a) we have to take class intervals as 0-2,2-4, etc. While making a frequency table, where does the number 2 go? In class interval 0-2 or 2-4 ?

Q. 3 Each of the 25 students in a class was given a home assignment comprising 10 questions in mathematics. The data given below show the number of questions solved and submitted by individual students on the next day.

1, 4, 5, 6, 0, 9, 3, 2, 3, 4, 6, 4, 5, 2, 7, 5, 2, 2, 3, 5, 1, 0, 7, 6, 3

(a) Taking classes as 0-2, 2-4, 4-6, etc., make a frequency table for the above distribution.
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