Question

5) mance .The Some data has been given below (Q. 1 - 4) to be grouped into class intervals of appropriate widths and to draw a frequency table. Choose the correct type of class intervals and of optimum widths. The tables should have appropriate title and table numbers. 1) Income per month of 30 salaried people 1230, 1320, 1230, 1320, 1450, 1450, 1350, 2560, 2450, 2360, 1230, 1230, 1450, 1450, 1320, 1320, 1320, 1230, 1350, 1450, 2450, 1230, 1230, 1350, 1320, 1230, 1360, 1450, 2560, 2300 Eck 2) Days of absence of 50 employees in a firm in 2 hos larks ne a month 2 2 3, 2, 4, 6, 2, 5, 8, 1, 9, 10, 2, 3, 4, 7, 3, 4, 2, 5, 9, 1, 2, 4, 5, 8, 1, 9, 10, 2, 3, 7, 6, 1, 9, 1, 0, 2, 3, 2, 3, 4, 3, 5, 6, 7, 4, 7, 8, 9, 1, 10. 3) Heights in centimetres of 40 children: 160, 145, 145, 161, 167, 165, 165, 160, 145, 146, 147, 146, 165, 165, 160, 160, 165, 145, 154, 165, 146, 146, 165, 160, 160, 165, 167, 156, 165, 160, 163, 145, 146, 156, 165, 160, 145, 148, 150, 150. 4) Weights of 50 boxes of different kinds of fruits (in kilograms): 12.5, 13.5, 12.5, 42.5, 13.5, 8.5, 9, 10, 12.5, 13.5, 6.5, 3.5, 4, 9, 10, 12.5, 13.5, 14,9,6, 6.5, 3.5, 2.5, 12.5, 4, 4,4,4, 5, 6, 3, 3.5, 12.5, 13.5, 42.5, 6, 9, 12.5, 13.5, 14.5, 42.5, 6, 7, 9, 10, 13.5, 12.5, 13.5, 42.5, 34.5.​

Answer 1

Answer:

Sol. Following are five examples which are related to day-to-day life.

        (i) Number of girl students in our class.

        (ii) Number of computer sets in our computer-lab.

        (iii) Telephone bills of our house for last two years.

        (iv) Number of students appeared in an examination, obtained from newspapers.

        (v) Number of female teachers in all the schools in a state obtained from the education department.

2.   Classify the data in Q. 1 above as primary or secondary data.

Sol. We have:

        Primary data: (i), (ii) and (iii)

        Secondary data: (iv) and (v)

Answer 2

Answer:

Following are five examples which are related to day-to-day life.

(i) Number of girl students in our class.

(ii) Number of computer sets in our computer-lab.

(iii) Telephone bills of our house for last two years.

(iv) Number of students appeared in an examination, obtained from newspapers.

(v) Number of female teachers in all the schools in a state obtained from the education department