A hotel maintenance crew wants to estimate how many of the 12,000 lamps in their 30-story hotel need a new light bulb. Which of the following is a random sample of lamps to be inspected?
A
100 lamps on each floor chosen randomly
B
all lamps from the rooms with king-sized beds
C
400 lamps on the first 10 floors
D
all lamps in booked rooms
1 answer
A random sample of lamps to be inspected would be option A: 100 lamps on each floor chosen randomly. This random sample would ensure that every lamp in the hotel has an equal chance of being selected for inspection, providing a fair representation of the overall state of the lamps in the hotel.
3 answers