Statistics Question
(a) Mean :
The mean of a data set is the sum of the terms divided by the total number of terms. Using math notation we have:
(b) Median :
The median is the middle number in a sorted list of numbers. So, to find the median, we need to place the numbers in value order and find the middle number.
Ordering the data from least to greatest, we get:
3 3 5 7 12 18
As you can see, we do not have just one middle number but we have a pair of middle numbers, so the median is the average of these two numbers:
(c) Range :
The range is the difference between the highest and lowest values in the data set.
Ordering the data from least to greatest, we get:
3 3 5 7 12 18
The lowest value is 3.
The highest value is 18.
The range = 18 - 3 = 15.
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