Light Bulbs [2 points] Although LED light bulbs are much more efficient than older light bulbs, manufacturers still attempt to improve efficiency. Current LED light bulbs have average efficiency of about 85 lumens for each watt of electricity used. The Jeondeung company has created a new type of LED connection and wants to test if efficiency has increased. An independent random sample of 48 bulbs with the new connection had sample mean efficiency 86.9 lumens with sample standard deviation s = 5.12 lumens. At the