Answer correctly? That makes it harder.
I'm going to sort the data and drop the negative signs; we just have to remember to put them back as needed later.
9 12 14 18 39 43 49 49
We have n=8 data points.
The mode is the most frequent data value; here it's 49, which occurs twice, really -49.
The range is max - min, so 49 - 9 = 40. That one doesn't get a minus sign; range is always positive.
The sum of the points is 9+12+14+18+39+43+49+49=233
The mean is sum/n = 233/8 = 29.125, really -29.125
That's enough to answer the question, but for completeness let's get the median, which is the middle value. When we have an even number of values, 8 here, it's the average of the two middle values, the fourth and fifth, here.
median is (18 + 39)/2 = 28.5, really -28.5
Answer: mean -29.1, median -28.5, mode -49, range 40; last choice
