Question

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#​

Answer 1

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

Answer 2

see the attachment....