A hotel maintenance crew wants to estimate how many of the 12000 lamps in their 30-store hotel need a new light bulb. Which of the following is a random sample of lamps to be inspected?
A. all lamps in booked rooms
B. all lamps from the room with king beds
C. 100 lamps on each floor chosen randomly
D. 400 lamps on the first 10 floors
1 answer
C. 100 lamps on each floor chosen randomly