Statistics and Probability
Exam Prep Study Notes (Things to remember)
Mean
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The mean of a set of numbers is the sum of the numbers in the set divided by the number of values in that set |
Median
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Given a set of numbers, the median is the middle number in that set when the numbers are arranged in an ascending (smallest to the largest) order. For a set with an even number of values, the average of the two middle numbers is taken |
Mode
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is the number that appears most frequently in a given set |
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Tips
Graphs
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Use a bar graph to compare data Use a line graph to show trends over time Circle graph is used to show the parts of a whole. The percentages add up to 100% Use a scatter plot to show trends when the data points are not connected |
Impossible event
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Probability of an impossible event is 0 |
Certain event
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Probability of a certain event is 1 |
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