A quality control manager inspects a random sample of light bulbs and finds the mean lifespan of the sample is 950 hours, with a margin of error of 25 hours. Which statement is the most appropriate conclusion about the mean lifespan of the entire population of light bulbs?
It is greater than 950 hours.
It is exactly 950 hours.
It is less than 925 hours or greater than 975 hours.
It is between 925 hours and 975 hours.
