# statistics

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## Presentation Transcript

### Statistics :

3/12/2009 Statistics Fancy Farm

### Introduction :

3/12/2009 Introduction Using statistics is a helpful way to study different situations. Today I will demonstrate how to find the mean, median, and mode of a set of numbers.

### Topics of Discussion :

3/12/2009 Topics of Discussion The mean (or average) is found by taking the sum of the numbers and then dividing by how many numbers you added together. The number that occurs most frequently is the mode. When the numbers are arranged in numerical order, the middle one is the mean.

### Topic One :

3/12/2009 Topic One The mean (or average) is found by adding all the numbers and then dividing by how many numbers you added together. Example: 3,4,5,6,7 3+4+5+6+7= 25 25 divided by 5 = 5 The mean is 5.

### Topic Two :

3/12/2009 Topic Two The number that occurs most frequently is the mode. Example: 2,2,2,4,5,6,7,7,7,7,8 The number that occurs most frequently is 7. The mode is 7.

### Topic Three :

3/12/2009 Topic Three When numbers are arranged in numerical order, the middle one is the median. Example: 3,6,2,5,7 Arranged in order: 2,3,5,6,7 The number in the middle is 5. The median is 5.

3/12/2009 Averaging Grades Lowest 55 60 75 80 80 80 83 83 93 93 93 93 93 Highest

### Find the mean of the following set of grades: :

3/12/2009 Find the mean of the following set of grades: First add all the grades together. The total equals 1061. Now divide 1061 by 13 (total grades) The answer is 81.61. The mean is 81.61. Lowest 55 60 75 80 80 80 83 83 93 93 93 93 93 Highest

### Find the median of the following numbers: :

3/12/2009 Find the median of the following numbers: The median is the number in the middle of numbers which are in order from least to greatest. If we count from both sides, the number in the middle is 83. The median is 83. Lowest 55 60 75 80 80 80 83 83 93 93 93 93 93 Highest

### Find the mode of the following grades: :

3/12/2009 Find the mode of the following grades: The mode is the number which occurs most often. The number which occurs most often is 93. The mode is 93. Lowest 55 60 75 80 80 80 83 83 93 93 93 93 93 Highest

### Real Life : 