The following table gives the distribution of the life-time of 400 neon lamps
Life time 1500- 2000- 2500- 3000- 3500- 4000- 4500-
(in hours) 2000 2500 3000 3500 4000 4500 5000
14
56
Number of
lamps
86
Find the median life time of a lamp.
Its from class 10 statistics please answer fast
#answer correct or else report#
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Step-by-step explanation:
(While drawing it in a table format please calculate the cumulative frequency as well)
Total number of observations (f)
= 14+56+60+86+74+62+48= 400
Median = n/2th term
= 400/2th term = 200th term
Therefore, the median class is 2500-3000
Class mark = 2500+3000/2
= 5500/2 =2750
Thus, median size of lamp is 2750 hours
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