Question

the temperature (in degree Celsius) ऑफ मुंबई ड्यूरिंग अ पर्टिकुलर फॉर नाइट इन द मंथ ऑफ जून इस गिवेन बिलो :32,44,42,43,31,39,42,37,38,41,44,40,28,35
1)फाइंड द बैंक ऑफ द टेंपरेचर इन अबोध आटा
2)ऑन हाउ मेनी डेज वास द टेंपरेचर मोर देन मीन टेंपरेचर ​

Answer 1

Answer:

You want to study the

− Performance of your class in Mathematics.

− Performance of India in football or in cricket.

− Female literacy rate in a given area, or

− Number of children below the age of five in the families around you.

What kind of data would you need in the above situations? Unless and until you collect appropriate data, you cannot know the desired information. What is the appropriate data for each?

Discuss with your friends and identify the data you would need for each.

Some of this data is easy to collect and some difficult.

Answer 2

Answer:

Question 1:

The marks obtained by 40 students of class VIII in an examination are given below:

16, 17, 18, 3, 7, 23, 18, 13, 10, 21, 7, 1, 13, 21, 13, 15, 19, 24, 16, 3, 23, 5, 12, 18, 8, 12, 6, 8, 16, 5, 3, 5, 0, 7, 9, 12, 20, 10, 2, 23.

Divide the data into five groups, namely 0-5, 5-10, 10-15, 15-20 and 20-25 and prepare a grouped frequency table.

ANSWER:

The frequency table for the marks of 40 students of class VIII in an examination is given below:

Range of Marks Tally Marks Frequency

0−5 |||| |||| 9

5−10 |||| |||| 9

10−15 |||| || 7

15−20 |||| |||| 9

20−25 |||| | 6

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Question 2:

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, 84, 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?

ANSWER:

The frequency table can be completed as follows:

Marks Tally Marks Frequency

40−50 |||| 4

50−60 |||| ||| 8

60−70 ||| 3

70−80 ||| 3

80−90 || 2

The class interval with the greatest frequency (8) is 50−60.

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Question 3:

The following is the distribution of weights (in kg) of 52 persons:

Weight in kg Persons

30-40 10

40-50 15

50-60 17

60-70 6

70-80 4

(i) What is the lower limit of class 50-60?

(ii) Find the class marks of the classes 40-50, 50-60.

(iii) What is the class size?

ANSWER:

(i) The lower limit of the class 50−60 is 50.

(ii) Class mark for the class 40−50:

40+502=902=45

Again, class mark for the class 50−60:

50+602=1102=55

(iii) Here the class size is 40−30, i.e. 10.