1. What are the mean, median, mode, and range of the data set given the altitude of lakes in feet:
–12, –9, –14, –39, –49, –49, –18, and –43?
(1 point) and how
Mean: -30.125
Median: -23.5
Mode: There is no mode in this data set as each value only appears once.
Range: 40 (difference between the highest and lowest values)
To find the mean, add up all the values (which gives a sum of -241) and divide by the number of values (which is 8).
To find the median, arrange the values in order from least to greatest and find the middle value(s). In this case, the middle two values are -18 and -43, so the median is the average of those two values, which is -23.5.
To find the mode, look for the value that appears most frequently. In this data set, each value only appears once, so there is no mode.
To find the range, subtract the lowest value (-49) from the highest value (-9), which gives a difference of 40.