Measures of Central Tendency & Range

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Presentation transcript:

Measures of Central Tendency & Range

Mean: The AVERAGE values of a set of numbers. The mean is found by ADDING all of the values, then DIVIDING by the number of values in the set of data.

Mean = $3 Calculate the Mean: $2 $4 $1 $3 $6 2 + 4 + 4 + 1 + 3 + 2 + 6 = 30 10 Mean = $3

Median: The MIDDLE number in an ORDERED set of data, either from LEAST to GREATEST OR from GREATEST to LEAST.

1, 2, 2, 2, 2, 3, 4, 4, 4, 6 2 + 3 5 = = 2.5 2 2 Calculate the Median: $2 $4 $1 $3 $6 1, 2, 2, 2, 2, 3, 4, 4, 4, 6 2 + 3 5 = = 2.5 2 2

Mode: The number that occurs most OFTEN. There may be NO mode, ONE mode, or MORE than one mode for a set of data.

Calculate the Mode: $2 $4 $1 $3 $6 Mode = 2

Range: The DIFFERENCE between the LARGEST and the SMALLEST number in the set of data.

Calculate the Range: $2 $4 $1 $3 $6 6 - 1 = 5