Construct a frequency table for the following ages (in years) of 30 students using equal class intervals, one of them being 9-12, where 12 is not included.
18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17,15, 6, 18, 23, 22, 16, 9, 21, 11, 16.

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Solution

Sol:

Minimum observation is 6 and maximum observation is 23. So the range is 23-6 = 17

The classes of equal size covering the given data are: (6-9), (9-12), (12-15), (15-18),(18-21), (21-24).

Thus the frequency distribution may be given as under:

Suggest Corrections

127

Similar questions

Q. Construct a frequency table with class-intervals 0-5 (5 not included) of the following marks obtained by a group of 30 students in an examination.
0, 5, 7, 10, 12, 15, 20, 22, 25, 27, 8, 11, 17, 3, 6, 9, 17, 19, 21, 29, 31, 35, 37, 40, 42,45, 49, 4, 50, 16.

Question 100(i)

Construct a frequency distribution table for the following weights (in grams) of 35 mangoes, using the equal class intervals, one of them is 40-45 (45 not included):
30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37,
53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68
How many classes are there in the frequency distribution table ?

Q. The marks obtained by 36 students in a test in statistics (out of 50) are as below.

\begin{matrix} 3 & 5 & 1 & 15 & 35 & 45 & 23 & 31 & 40 & 21 & 13 & 15 20 & 47 & 48 & 42 & 34 & 43 & 45 & 33 & 37 & 11 & 13 & 27 18 & 12 & 37 & 39 & 38 & 16 & 13 & 18 & 5 & 41 & 47 & 43 \end{matrix}

Construct a frequency distribution table with equal class intervals, one of them being 10-20(20 is not included).

Q. A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included) as one of the class interval is constructed for the following data:
268, 220, 368, 258, 242, 310, 272, 342, 310, 290, 300, 320, 319, 304, 402, 318, 406, 242, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236
The frequency of the class 310-330 is _________.

Q. The marks obtained by

36

students in a test in statistics (out of

50

) are as below.

3511535452331402113152047484234434533371113271812373938161318

5414743

Construct a frequency distribution table with equal class intervals, one of them being

10 - 20

(

20

is not included)

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Construct a frequency table for the following ages (in years) of 30 students using equal class intervals, one of them being 9-12, where 12 is not included. 18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17,15, 6, 18, 23, 22, 16, 9, 21, 11, 16.

Sol: Minimum observation is 6 and maximum observation is 23. So the range is 23-6 = 17 The classes of equal size covering the given data are: (6-9), (9-12), (12-15), (15-18),(18-21), (21-24). Thus the frequency distribution may be given as under:

Construct a frequency table for the following ages (in years) of 30 students using equal class intervals, one of them being 9-12, where 12 is not included.
18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17,15, 6, 18, 23, 22, 16, 9, 21, 11, 16.

Sol:

Minimum observation is 6 and maximum observation is 23. So the range is 23-6 = 17

The classes of equal size covering the given data are: (6-9), (9-12), (12-15), (15-18),(18-21), (21-24).

Thus the frequency distribution may be given as under: