Statistics Unit Test

Question

2 of 162 of 16 Items
Question
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?(1 point)
Responses

100 lamps on each floor chosen randomly
100 lamps on each floor chosen randomly

400 lamps on the first 10 floors
400 lamps on the first 10 floors

all lamps in booked rooms
all lamps in booked rooms

all lamps from the rooms with king-sized beds

Answer 1

A random sample is one in which each item in the population has an equal chance of being selected.

In this scenario, the best option for a random sample of lamps to be inspected is:

100 lamps on each floor chosen randomly

This option ensures that a representative sample is taken from each floor of the hotel, which allows for the variation in lamp usage and types across different floors to be accounted for. The other options do not provide a random sampling method, as they focus on specific groups rather than a diverse random selection across the hotel.