. A lightbulb manufacturer wants to make sure the lightbulbs being produced give o the correct level of
brightness. Brightness is measured using the unit of measurement known as a lumen. A worker
randomly selects 100 lightbulbs and tests how bright they are. The mean brightness of this sample of
lightbulbs is 450 lumens with a standard deviation of 6.8 lumens. The worker uses this data to construct
the following 95% confidence interval: (448.67,451.33) Recommend a strategic decision for the manufacturer.
The manufacturer should increase the brightness level of these lightbulbs.
The manufacturer should decrease the brightness level of these lightbulbs.
The manufacturer should continue producing the lightbulbs without changes.
The manufacturer should use different electrical components to reduce the range of the confidence
interval.