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Data Analysis is the process of collecting and organizing data for making decisions. It is used analytical and logical reasoning to get information from the data. In SAT they are some questions from this topic to assess your ability and your skills in problem-solving. Learn an overview of Data Analysis by this video tutorial and also learn about different types of graphs like Bar Graphs, Line graphs, Circle graphs.

Heart of Algebra - Averages, Ratios, Proportions & Unit conversions Averages - The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count. Ratios - In mathematics, a ratio indicates how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8∶6, which is equivalent to the ratio 4∶3).