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Бесконтактное обследование
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Jess & Danny Math Exit Project

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Jess & Danny Math Exit Project

  1. 1. The Average It is smarter to stay away from this sometimes unclear term. It usually relates to the (arithmetic) mean. It can also indicate the mode, median, the weighted means, or the geometric mean, including many others.
  2. 2. Histograms A Histogram, in which the area of each bar’s interval is not there. The bars are connected and it shows a difference between each set of data. The photo to the right is an example of a histogram.
  3. 3. The Mean The mean is the total of the data divided by the total amount of numbers in the set. Also called arithmetic mean. Example: What is the mean of this set of numbers? 2, 4, 6, 8, 10. First, you have to add the numbers together, getting 20. Then, you must divide 20 by the amount of numbers in the set (which is five). The mean comes out to be 4.
  4. 4. The Median The median is the middle value in a set of data. If the list has an odd number of values, the median is the middle entry in the set, after arranging the list into a rising order. If the list has an EVEN amount of values, the median comes out to be both the sum of the two numbers divided by 2. The median can also be estimated using a histogram. Example: What is the median in this set of numbers? 2, 8, 9, 12, 4, 5, 6, 6, 10, 6. First, we have to put the numbers into increasing order. It comes out to be 2, 4, 5, 6, 6, 6, 8, 9, 10, 12. We have to find the number located in the middle.The median is 6.
  5. 5. The Mode For all lists, the mode is really the number that appears the most. A list can have over one mode. A list has no mode when every number comes up with the same frequency. A list has more than one mode when two or more numbers come up with the same frequency. Example: Find the mode in this set of numbers:2, 3, 6, 7, 8, 11, 13, 2, 4, 2. The mode is 2, since it appears three times.
  6. 6. Multimodal Distribution A distribution witha mode greater than one. The histogram of a multimodal distribution has more than one “bump”. A bump is the difference between two bars in a histogram.
  7. 7. The Range The range in a set of data is the smallest number subtracted from the greatest number. The range is a single number, not several numbers. Example: What is the range in this set of numbers? 64, 99, 82, 73, 58. The range is equal to 99 – 58, which is equal to 41.
  8. 8. Total The total is the total number of the sum. It is equal to all the numbers in the set added together. Example: What is the total of this data set? 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. We have to add them all together, which comes out to be 55.
  9. 9. Get to Work Range: ___ James and his friends compared state wide test Mean: ___ scores. Jon got a Median: ___ 735, Danielle got a 675, Jamie got a 650, Amy Mode: ___ got a 790, Jessica got a 790, Danny got a 625, and Total: ___ James got a 780. Make a Histogram: ___
  10. 10. Answers Test Scores 900 Range: 165 800 700 600 Scores Median: 735 500 400 300 Mean: About 609 200 100 0 Mode: 790 Total: 5,020 Students
  11. 11. Bibliography 7th grade Impact Math Copyright 2009


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