Advertisements
Advertisements
प्रश्न
The width of each of nine classes in a frequency distribution is 2.5 and the lower class boundary of the lowest class 10.6. Then the upper class boundary of the highest class is
विकल्प
35.6
33.1
30.6
28.1
उत्तर
The number of classes is 9 and the uniform class size is 2.5. The lower limit of the lower class (first class) is 10.6. Therefore, the upper limit of the last class is
`10.6 + (9xx2.5)`
=10.6 + 22.5
=33.1
APPEARS IN
संबंधित प्रश्न
The heights of 50 students, measured to the nearest centimeters, have been found to be as follows:-
161 | 150 | 154 | 165 | 168 | 161 | 154 | 162 | 150 | 151 |
162 | 164 | 171 | 165 | 158 | 154 | 156 | 172 | 160 | 170 |
153 | 159 | 161 | 170 | 162 | 165 | 166 | 168 | 165 | 164 |
154 | 152 | 153 | 156 | 158 | 162 | 160 | 161 | 173 | 166 |
161 | 159 | 162 | 167 | 168 | 159 | 158 | 153 | 154 | 159 |
(i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165, 165 - 170, etc.
(ii) What can you conclude bout their heights from the table?
Three coins were tossed 30 times simultaneously. Each time the number of heads occurring was noted down as follows:-
0 | 1 | 2 | 2 | 1 | 2 | 3 | 1 | 3 | 0 |
1 | 3 | 1 | 1 | 2 | 2 | 0 | 1 | 2 | 1 |
3 | 0 | 0 | 1 | 1 | 2 | 3 | 2 | 2 | 0 |
Prepare a frequency distribution table for the data given above.
The marks scored by 40 students of class IX in mathematics are given below:
81, 55, 68, 79, 85, 43, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70,
83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54.
Prepare a frequency distribution with class size of 10 marks.
The marks scored by 55 students in a test are given below:
Marks | 0-5 | 5-10 | 10-15 | 15-20 | 20-25 | 25-30 | 30-35 |
No. of students | 2 | 6 | 13 | 17 | 11 | 4 | 2 |
Prepare a cumulative frequency table:
In the class intervals 10-20, 20-30, 20 is taken in
The following marks were obtained by the students in a test:
81, 72, 90, 90, 86, 85, 92, 70, 71, 83, 89, 95, 85, 79, 62
The range of the marks is
The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The upper class-limit of the highest class is ______.
For drawing a frequency polygon of a continous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abcissae are respectively ______.
The blood groups of 30 students are recorded as follows:
A, B, O, A, AB, O, A, O, B, A, O, B, A, AB, B, A, AB, B, A, A, O, A, AB, B, A, O, B, A, B, A
Prepare a frequency distribution table for the data.
The scores (out of 100) obtained by 33 students in a mathematics test are as follows:
69, 48, 84, 58, 48, 73, 83, 48, 66, 58, 84, 66, 64, 71, 64, 66, 69, 66, 83, 66, 69, 71, 81, 71, 73, 69, 66, 66, 64, 58, 64, 69, 69
Represent this data in the form of a frequency distribution.