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Method and examples
Find the missing frequencies in the following frequency distribution when mean is given
 Type your data in either horizontal or verical format, for seperator you can use '-' or ',' or ';' or space or tab for sample click random button OR X & Frequency   Class & Frequency Rows : Click On Generate
 Total Frequency (N) = Mean Median Mode Quartile Decile Percentile 1 2 3 =
1. Find missing frequency from the follwing data
 Class 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 Frequency 1 7 11 ? ? 4 2
Total Frequency (N) = 40 and mean = 16.5
2. Find missing frequency from the follwing data
 Class 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 Frequency 11 20 35 20 a 6
mean = 18.1
3. Find missing frequency from the follwing data
 Class 11 - 20 21 - 30 31 - 40 41 - 50 51 - 60 61 - 70 71 - 80 Frequency 42 38 a 54 b 36 32
Total Frequency (N) = 400 and median = 38.5
4. Find missing frequency from the follwing data
 Class 40 - 59 60 - 79 80 - 99 100 - 119 120 - 139 Frequency 50 ? 500 ? 50
Total Frequency (N) = 1000 and median = 87.50
5. Find missing frequency from the follwing data
 Class 50 - 100 100 - 150 150 - 200 200 - 250 250 - 300 Frequency 35 60 ? 40 20
median = 168
6. Find missing frequency from the follwing data
 Class 0 - 50 50 - 100 100 - 150 150 - 200 200 - 250 250 - 300 300 - 350 Frequency 2 4 7 21 ? 20 21
q-3 = 290
7. Find missing frequency from the follwing data
 Class 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 45 - 50 Frequency 24 64 90 122 b 56 20 33
q-1 = 21.5
8. Find missing frequency from the follwing data
 Class 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 45 - 50 Frequency 24 a 90 122 b 56 20 33
Total Frequency (N) = 460 and q-1 = 21.5
9. Find missing frequency from the follwing data
 Class 0 - 50 50 - 100 100 - 150 150 - 200 200 - 250 250 - 300 300 - 350 Frequency 2 4 7 21 ? ? 21
Total Frequency (N) = 100 and q-3 = 290
10. Find missing frequency from the follwing data
 Class 0 - 400 400 - 800 800 - 1200 1200 - 1600 1600 - 2000 2000 - 2400 2400 - 2800 2800 - 3200 Frequency 4 12 a 50 b 13 9 4
Total Frequency (N) = 167 and mode = 1360
11. Find missing frequency from the follwing data
 Class 0 - 400 400 - 800 800 - 1200 1200 - 1600 1600 - 2000 2000 - 2400 2400 - 2800 2800 - 3200 Frequency 14 22 ? 124 ? 32 15 5
Total Frequency (N) = 360 and mode = 1376
12. Find missing frequency from the follwing data
 Class 0 - 10 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70 70 - 80 Frequency 4 4 9 ? 12 6 3 2
mean = 37
13. Find missing frequency from the follwing data
 Class 100 - 110 110 - 120 120 - 130 130 - 140 140 - 150 150 - 160 Frequency 100 130 71 20 ? 50
mean = 123
14. Find missing frequency from the follwing data
 Class 0 - 20 20 - 40 40 - 60 60 - 80 80 - 100 100 - 120 120 - 140 Frequency 5 13 ? 15 ? 20 7
Total Frequency (N) = 100 and mean = 74
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