Median 09
Median 09 :
The measure of central location that divides a set of data into two equal parts. This number may or not be equivalent to the average or arithmetic mean. The median is found two different ways depending on the number of observations. If the number of observations is odd, then there is a unique central point. Suppose five student's test scores are the following: 93, 68, 83, 96, and 85. First, these numbers are placed in order from lowest to highest: 68, 83, 85, 93, and 96. The middle observation is observation #3, 85. This is the median. For samples with an even number of observations, there is no unique central point, and the two middle points would be averaged to obtain the median. Suppose there are six test scores: 68, 75, 83, 85, 93, 96. The two middle scores as 83 and 85. Once averaged, (83+85/2=84), the median is 84
