Mode is the most common value among the given observations. For example, a person who sells ice creams might want to know which flavor is the most popular.
Median is the middle value, dividing the number of data into 2 halves. In other words, 50% of the observations is below the median and 50% of the observations is above the median.
Mean is the average of all the values. For example, a teacher may want to know the average marks of a test in his class.
Range tells how far apart the greatest and least numbers in a set are. It is the difference between the largest and smallest numbers.
The range of a set of numbers is the difference between the least number and the greatest number in the set.
Find the range:
a) 150, 250, 825, 400, 18, 500
b) 2.2, 1.8, 5.1, 0.3
a) The largest value is 825. The smallest value is 18
Range = largest value − smallest value = 825 − 18 = 807
b) The largest value is 5.1. The smallest value is 0.3
Range = largest value − smallest value = 5.1 − 0.3 = 4.8
Finding the range and mid-range
The range is the difference between the largest and smallest numbers. The midrange is the average of the largest and smallest number. Practice with this problem.
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