How to Analyze Data (aka Crunching Numbers) MEAN (aka: The Average) • the total divided by the number of items in a set • Add all the items in the set. • Divide the sum by the number of items in the set. • • • • • •!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!• • • • • •!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!• • • • • •!!•!!•
MEDIAN (aka: The Middle) • the number that lies in the middle of a set arranged in order • Arrange all the items in the set from least to greatest. • Eliminate the high and low values. • Repeat until one middle number remains. • If two numbers remain, find the mean of those two numbers. • The mean of the two numbers is the median.
• • • • • •!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!• • • • • •!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!• • • • • •!!•!!•
MODE (aka: The Most) • the data that occurs most frequently in a set • Group all the items of the set by value. • Count the number in items in each group. • Sometimes there may be more than one mode. • Sometimes there may not be a mode.
• • • • • •!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!• • • • • •!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!•!!• • • • • •!!•!!•
RANGE (aka: The Spread) • the difference between the greatest and least values of a set • Subtract from the greatest number in a set the least number in a set.