Question

18. Calculate mean, median and mode from the following data:
40-50
50-60
60-70
70-80
80-90
Class 30-40
interval
Frequency 18
37
45
27
15
8​

Answer 1

ANSWER

ANSWERClass intervals Frequency

ANSWERClass intervals Frequency 10-20 7

ANSWERClass intervals Frequency 10-20 7 20-30 12

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40So modal class is 30-40

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40So modal class is 30-40Now lower limit of modal class (l)=30

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40So modal class is 30-40Now lower limit of modal class (l)=30Frequency (f1) of modal class =20

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40So modal class is 30-40Now lower limit of modal class (l)=30Frequency (f1) of modal class =20frequency (f0) of preceding the modal class =12

ANSWERClass intervals Frequency 10-20 7 20-30 12 30-40 20 40-50 11 50-60 8Here maximum frequency is 20 ,the class corresponding to this 30-40So modal class is 30-40Now lower limit of modal class (l)=30Frequency (f1) of modal class =20frequency (f0) of preceding the modal class =12freq