Question Answers

Sahay Sir > Question Answers > NCERT Class 9 > Maths > Chapter 14 - Statistics > 5. The following table gives the life times of 400 neon lamps: Life Time (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 life time of more than 700 hours?

5. The following table gives the life times of 400 neon lamps: Life Time (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 life time of more than 700 hours?

2. Classify the data in Q.1 above as primary or secondary data.