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What does the mean show?
The mean is a summary statistic that shows where the center of your dataset is. There are several types of mean but the most common is the arithmetic mean which is simply the sum of all the values divided by the number of values.
What is a good measure of central tendency if a data set contains extreme values that may be the result of incorrect measurement?
The median.
What is the median of a set of numbers if the set of numbers is even?
To find the median of a set of values with an even number of values, place the values in ascending or descending order, find the 2 middle numbers and add them together and divide that total by 2 and that's the median.
What does it means if the standard deviation is small?
Simplest terms, it means that the sample values are grouped closely together. Another way of saying it is that the range of values is small. The plot will be a leptokurtic plot (peaked).
What is median on a line graph?
It is the exact point in the middle of the line segment. Add the 'x' values together , and divide by 2 ,and then add the 'y' values and divide by 2. This will give you the median of a line segment.
