Mathematics
The data given below represent the marks obtained by 35 students:
21 26 21 20 23 24 22 19 24
26 25 23 26 29 21 24 19 25
26 25 22 23 23 27 26 24 25
30 25 23 28 28 24 28 28
Taking class intervals 19 - 20, 21 - 22 etc., make a frequency distribution for the above data.
Construct a combined histogram and frequency polygon for the distribution.
Related Questions
The electricity bills (in rupees) of 40 houses in a locality are given below :
78 87 81 52 59 65 101 108 115 95
98 65 62 121 128 63 76 84 89 91
65 101 95 81 87 105 129 92 75 105
78 72 107 116 127 100 80 82 61 118
Form a frequency distribution table with a class size of 10. Also represent the above data with a histogram and frequency polygon.
Construct a combined histogram and frequency polygon for the following distribution:
Classes Frequency 91 - 100 16 101 - 110 28 111 - 120 44 121 - 130 20 131 - 140 32 141 - 150 12 151 - 160 4 In a class of 60 students, the marks obtained in a surprise test were as under :
Marks No. of students 14 - 20 4 20 - 26 10 26 - 32 9 32 - 38 15 38 - 44 12 44 - 50 5 50 - 56 3 56 - 62 2 Represent the above data by a histogram and a frequency polygon.
The given histogram and frequency polygon shows the ages of teachers in a school. Answer the following:
(i) What is the class size of each class?
(ii) What is the class whose class mark is 48?
(iii) What is the class whose frequency is maximum?
(iv) Construct a frequency table for the given distribution.