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? 400 lamps on the first 10 floors? All lamps in booked rooms? Or all lamps from the rooms with king size beds? Or 100 lamps on each floor randomly chosen? Which one is correct?

Answer 1

The correct answer is: 100 lamps on each floor randomly chosen.

This sample would provide a more accurate representation of the overall condition of the lamps in the hotel as it ensures a random selection from each floor. This way, all floors are equally represented in the sample, leading to a more accurate estimate of how many lamps need a new light bulb throughout the entire hotel.