What are the mean mode and range of the data set given the altitude of lakes in feet?
-12,-9,-14,-39,-49,-49,-18,-43
Mean:
To find the mean, you need to add up all the numbers in the data set and then divide by the total number of numbers.
-12 + (-9) + (-14) + (-39) + (-49) + (-49) + (-18) + (-43) = -233
There are 8 numbers in the data set, so:
Mean = -233/8
Mean = -29.13
Mode:
The mode is the number that appears most frequently in the data set. In this case, there are two numbers that appear twice: -49 and -14. So, the mode is -49 and -14.
Range:
The range is the difference between the largest and smallest numbers in the data set.
The smallest number is -49 and the largest number is -9.
Range = -9 - (-49)
Range = 40
So, the mean is -29.13, the mode is -49 and -14, and the range is 40.