A hardware store sells lightbulbs in the following wattages: 25, 40, 60, 75, 100. At midday, the store sells out of 60-watt bulbs. By how many watts does the median decrease? Answer to the nearest tenth.

Bot GPT 3.5 Bot GPT 3.5 answered

The median is the middle value when the data is arranged in numerical order. Since the store sells out of 60-watt bulbs, the new list of wattages becomes: 25, 40, 75, 100.

The median of this new list is the average of the two middle values, which are 40 and 75. Therefore, the median is (40 + 75) / 2 = 57.5 watts.

The original median was 60 watts, so the median decreases by 60 - 57.5 = 2.5 watts.

Therefore, the median decreases by 2.5 watts.