UNDERSTAND WHAT IS MEAN,MEDIAN, MODE AND RANGE CALCULATE MEAN,MEDIAN,MODE AND RANGE Students and Teachers will be able to.

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Presentation transcript:

UNDERSTAND WHAT IS MEAN,MEDIAN, MODE AND RANGE CALCULATE MEAN,MEDIAN,MODE AND RANGE Students and Teachers will be able to

Circle the measures of central tendency below. (Hint: There are only 3 measures of central tendency.) ModeMean Range Median

The mean is the numerical average of the data set. The mean is found by adding all the values in the set, then dividing the sum by the number of values.

Lets find AMAR’s MEAN science test score? ÷ 9 The mean is 87

The MEDIAN is the number that is in the middle of a set of data 1. Arrange the numbers in the set in order from least to greatest. 2. Then find the number that is in the middle.

The median is 88. Half the numbers are less than the median. Half the numbers are greater than the median.

Sounds like MEDIUM Think middle when you hear median.

MEDIAN How do we find the MEDIAN when two numbers are in the middle ? 1. Add the two numbers. 2. Then divide by 2.

= ÷ 2 The median is 91.5

The MODE is the piece of data that occurs most frequently in the data set. A set of data can have:  One mode  More than one mode  No mode

The value 97 appears twice. All other numbers appear just once. 97 is the MODE

A Hint for remembering the MODE… The first two letters give you a hint… MOde Most Often A Hint for remembering the MODE… The first two letters give you a hint… MOde Most Often

9, 11, 16, 8, 16 9, 11, 16, 6, 7, 17, 18 18, 7, 10, 7, 18 A C B

13, 12, 12, 11, 12 9, 11, 16, 6, 7, 17, 18 18, 7, 10, 7, 18 A A C C B B

9, 11, 16, 8, 16 9, 11, 16, 6, 7, 17, 18 18, 7, 10, 7, 18 A C B

The RANGE is the difference between the lowest and highest values.

is the RANGE or spread of this set of data

This one is the requires more work than the others. Right in the MIDDLE. This one is the easiest to find— Just LOOK.

Mean Range Mode Median Middle Most Difference Average

ChildrenAgesAndrew13 Robin6 Betty7 Orlando6 Amy13 Mean = 9 Median = 7 Mode = 6 and 13 Range = 7

Homerooms Pizza Orders Moore13 Ragland7 McNeill17 Pettus19 Powell7 McConahey15 Crews11 Clarke7 Mean = 12 Median = 12 Mode = 7 Range = 12

Visitors to the Art Museum (thousands) Mean = 5,000 Median = 4,000 Mode = 3,000 Range = 10,000

Mean3 inches Median3 inches Modenone Range6 inches Snowfall in Inches

Quiz Grades Mean 73 Median 72 Mode 72 Range 26