Question

Question 5 The following table gives the life times of neon lamps:

Length (in hours) Number of lamps
300 − 400 14
400 − 500 56
500 − 600 60
600 − 700 86
700 − 800 74
800 − 900 62
900 − 1000 48

(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?

Class 9 - Math - Statistics Page 259"

Answer 1

Hello freind
I) By taking lifetime (in hours of neon lamp) on x axis and the no. of lamp in y axis

ii) the sum of neon lamps having their lifetime I.e. 700 ( 74 +62+48=184)

Answer 2

Hi friend...

1=)The histogram of the given frequency distribution.

2)Number of lamps having life more than 700 hrs .

=74+62+48
=184
184 is an answer...


Hope it will helpful.....