Question

Suppose that a certain brand of light bulb has a mean life of 600 hours. What does this mean?

a) Every light bulb will last exactly 600 hours.
b) The average life of all light bulbs is 600 hours.
c) The minimum life of a light bulb is 600 hours.
d) Not specified.

Answer 1

The statement means that the average life of all the light bulbs of that brand is 600 hours. Hence the correct answer is option B

Step-by-step explanation:

The statement "a certain brand of light bulb has a mean life of 600 hours" means that the average life of all the light bulbs of that brand is 600 hours, which is option b) The average life of all light bulbs is 600 hours.

Hence the correct answer is option B