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Our Lesson

Our Lesson. Mean, Median and Mode. Warm Up. Graphs are pictorial representation for a set of ________. The data Ranges are the data present in the _________ . 3. Bar graphs is also known as _________ . 4. Data Representation on the Graph is ________.

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Our Lesson

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  1. Our Lesson Mean, Median and Mode

  2. Warm Up • Graphs are pictorial representation for a set of ________. • The data Ranges are the data present in the _________. 3. Bar graphs is also known as _________. • 4.Data Representation on the Graph is ________. • 5. Graphs can be of different types. __________and_________. Confidential

  3. Lets recap what we have learned in this lesson 1. Graphs are pictorial representation for a set of data ranges. 2. Graphs can be of different types. Line graph and Bar graph 3. Data Representation on the Graph is Labels 4. This will allow you to put informative data on the graph to make it easier to read. Confidential

  4. Review Line Graph A line graph is a way to summarize how two pieces of information are related and how they vary depending on one another. Bar graph Along a side of the bar graph are called thescale Bar graphs consist of an axis and a series of labeled horizontal or vertical bars that show different values for each bar Confidential

  5. Lets get Started Mean, median, and mode are three kinds of "averages". There are many "averages" in statistics, but these are, the three most common. The "mean" is the "average“, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the list of numbers. The "mode" is the value that occurs most often. Confidential

  6. Mean or Average MeanMean is the most common measure of central tendency. It is simply the sum of the numbers divided by the number of numbers in a set of data.This is also known as average. Example: Find the mean for the following data: 5, 15, 10, 20, 10 Sum of data = 5 + 15 + 10 + 20 + 10 = 60 Number of data = 6 Mean = Sum of data/ Number of data = 60/6 = 10 Confidential

  7. Median Median: Median is the number present in the middle when the numbers in a set of data are arranged in ascending or descending order. If the number of numbers in a data set is even, then the median is the mean of the two middle numbers. Example: Find the median for the given data. 3, 7, 9, 4, 5, 4, 6, 7,9 The data set in the ascending order is 3, 4, 4, 5, 6, 7, 7, 9, and 9. Median is the middle data value of the ordered set. Median of the set = 6 Confidential

  8. Mode Mode: Mode is the value that occurs most frequently in a set of data. Example: Find the mode of the given data 1, 2, 9, 6, 9 Mode is/are the data values that appear most often in the data set. So, the mode of the data set is 9. Confidential

  9. Range Definition:  The range of a set of data is the difference between the highest and lowest values in the set. Example: Cheryl took 7 math tests in one marking period. What is the range of her test scores?  89,  73,  84,  91,  87,  77,  94 Solution:  Ordering the test scores from least to greatest,   73,  77,  84,  87,  89,  91,  94   highest - lowest = 94 - 73 = 21 The range of these test scores is 21 points. Confidential

  10. Your Turn 1) __________ is known as Average. 2) Numbers in a data set is even, then the median is the ________ of the two middle numbers. 3) Mean is the most common measure of __________. 4) ________ is the value that occurs most frequently in a set of data. 5) Write the formula of mean? Confidential

  11. Your Turn 6) _______, _________ and _______ are three kinds of averages. 7) The ______ is the middle value in the list of numbers. 8) _______ is the difference between the highest and lowest values in the set. 9) Find the range of these quiz score 93,  79,  83,  89,  90,  71,  85 ______ 10) If the number of Numbers in a data set is _____, then the median is the means of the two middle numbers. Confidential

  12. Refreshment time Confidential

  13. Lets play a Game http://www.miniclip.com/games/bad-apple/en/ Confidential

  14. 1) The mean (average) weight of three dogs is 38 pounds. One of the dogs, Sparky, weighs 46 pounds. The other two dogs, Eddie and Sandy, have the same weight. Find Eddie's weight. Confidential

  15. 2) For what value of  x  will 8 and x have the same mean (average) as 27 and 5? Confidential

  16. 3) A student has gotten the following minimum grade he must get on the last test in order to achieve that average grades on his tests: 87, 95, 76, and 88. He wants an 85 or better overall. What is the mean? Confidential

  17. Lets review what we have learned in our lesson • Mean The average of a group of numbers is called the mean. • MedianThe middle number of the group is called the median. • ModeThe number that appears the most often in a listing of number mean: "average"median: middle valuemode: most often Confidential

  18. You did great in your lesson today ! Be sure to practice and keep up the good work Confidential

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