Grouped Frequency Table
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If the classes in a grouped frequency distribution are not continuous, we can make them continuous by finding half of the difference between the upper limit of a class and the lower limit of the next class, and then adding the same to all the lower limits and subtracting it from all the upper limits in the distribution.
- True
- False
- 85
- 75
- 65
{3, 1, 4, 2, 4, 7, 9, 10, 12, 14, 14, 17}
- 1
- 2
- 4
- 5
The weekly expenses (₹) of 30 students of a class are given below: 62 , 80 , 110 , 75 , 84 , 73 , 60 , 62, 100 , 87 , 78 , 94 , 117, 86, 65, 68, 90, 80, 118 , 72, 95, 72, 103, 96, 64, 94, 87, 85, 105, 115. Which among the given options is the correct frequency table?
Weekly expensesNumber of Students60−70670−80580−90590−1003100−1103110−1204
Weekly expensesNumber of Students60−70670−80580−90790−1003100−1103110−1204
Pocket ExpenseNumber of Students60−70670−80580−90790−1005100−1103110−1204
Weekly expensesNumber of Students60−70670−80580−90590−1005100−1107110−1204
Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
1623512584810341228151176328596871412
Make a grouped frequency distribution table for this data, taking class width as 5 and one of the class intervals as 5- 10.
HoursNumber of children0−5115−101210−15515−202Total30
HoursNumber of children0−5105−101310−15515−202Total30
HoursNumber of children0−5105−101410−15415−202Total30
None of the above
13, 32, 45, 67, 23, 18, 23, 21, 10, 19, 18, 17, 24, 12, 45, 56, 76, 80, 23, 12, 11, 12, 19, 15, 19, 54, 74, 34, 58, 34.
If this distribution is converted into a grouped frequency distribution, what is the length of the class interval if the number of the class interval is 5?
- 80
- 5
- 14
- 12
Salary (In Rupees) | Number of people |
5000-10000 | 5 |
10000-20000 | 10 |
20000-30000 | 15 |
How many people salary lie in between ₹10000 to ₹30000?
- 5
- 10
- 15
- 25
18, 32, 54, 67, 23, 1, 23, 21, 10, 19, 81, 17, 24, 12, 45, 65, 67, 80, 23, 12, 11, 12, 21, 3, 10, 45, 47, 34, 85, 43.
If this distribution is converted into grouped frequency distribution, what is the length of class interval if number of class interval is 7 ?
- 80
- 5
- 16
- 12
Ages | No. of People |
1 - 10 | 10 |
11 - 20 | 8 |
21 - 30 | 15 |
31 - 40 | 8 |
41 - 50 | 9 |
If the age of a person is 30, he should be included in ___________.
- 1st class interval
- 2nd class interval
- In both 1st and 2nd class interval
- 3rd class interval
162, 155, 166, 173, 170, 161, 166, 151, 167, 176, 178, 175, 163, 165, 170, 152, 172, 166, 176, 159, 157, 158, 148, 174, 152, 162, 171, 178, 157, 145, 148.
The given data has been grouped into class intervals in the given frequency distribution table.
Fill in the table with the missing frequencies.
Class intervalFrequency(fi)145−1503150−1553155−160p=−−−−160−165q=−−−−165−170r=−−−−170−175s=−−−−175−1805
- p = 6, q = 4, r = 5, s = 6
- p = 6, q = 4, r = 4, s = 6
- p = 5, q = 4, r = 5, s = 6
- p = 6, q = 5, r = 5, s = 6