Terms and Definitions -
Any words, terms or phrases that appear in your Grade 10 IGCSE Mathematics studies can be found alphabetically listed below...
STATISTICS
CUMULATIVE FREQUENCY (C.F.) is the total frequency up to a given point in a set of data
Two events are EXCLUSIVE if they cannot occur at the same time. The 'OR' rule gives P(A or B) = P(A) + P(B) Two events are INDEPENDENT if the occurrence of one event is unaffected by the occurrence of the other. The 'AND' rule gives P(A and B) = P(A) x P(B) FREQUENCY POLYGONS can be drawn by joining the mid-points of the tops of the bars of a frequency chart |
In a HISTOGRAM the frequency of the data is shown by the area of each bar. Bars can vary in width and therefore the height of the bar represents the 'frequency density' found by: The MEAN is found by adding all the numbers together and then dividing by the number of values in the setfrequency density = frequency / class width The MEDIAN is found by writing the numbers in ascending order and then finding the middle value The MODE is the value which occurs the most in a data set The RANGE is a value showing the spread of the date and is found by subtracting the smallest value from the largest |
PROBABILITY
PROBABILITY is the study of chance
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TREE DIAGRAMS are highly useful for diagrammatically representing the possible variety of outcomes of various events and their associated probabilities, particularly when two or more events occur together
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