Answer:
The mean score would decrease more than the median score.
Explanation:
our current data set: 100, 120, 130, 150
our new data set with 0, ordered: 0, 100, 120, 130, 150
our current median:
100, 120, 130, 150
take the bottom and top out
120, 130
there are 2 left, so find the mean of these 2 to get our median
125
our new median:
0, 100, 120, 130, 150
take the bottom and top out
100, 120, 130
take the bottom and top out
120
current median = 125, new median = 120, difference = 120-125 = -5 for a decrease of 5
mean = sum / number of items
current mean = (100+120+130+150)/4 = 125
new mean = (0 + 100 + 120 + 130 + 150)/5 = 100
new mean - current mean = -25 for a decrease of 25
thus, our answer is: The mean score would decrease more than the median score.