mean,mode,median

• What should you be able to calculate by the end of the video?

  The mean, median, and mode for a set of values
• Why do students often panic at the thought of maths?

  They believe it is difficult
• If a student measures the heights of five plants as 5, 4, 7, 6, and 5 cm, what is the mean height?

  The mean height is 5.4 cm
• In the example of the earthworms, what is the mean mass excluding the anomalous result of 21 grams?

  The mean mass is 10.5 grams
• What is the process to calculate the mean?

  • Add all the numbers together
  • Divide by the number of values
• How do you determine the median of a set of numbers?

  • Order the numbers from lowest to highest
  • Select the middle number
  • If even, take the mean of the two middle numbers
• What is an anomalous result?

  An anomalous result is one that does not fit the pattern
• Given the numbers 4, 8, 4, 7, 6, 3, and 8, what is the median value?

  The median value is 6
• What happens when there is an even set of numbers while calculating the median?

  The median is the mean of the two central numbers
• If there are eight numbers with middle values of 6 and 8, what is the median?

  The median is 7
• What is the mode of a set of numbers?

  • The mode is the number that appears most often
  • If no number appears more than once, there is no mode
• In the example of the daisies, what is the mode of the numbers 2, 5, 6, 6, 7, 7, 7, 9, and 10?

  The mode is 7
• What if there is no single number that appears most often in a data set?

  Then there cannot be a mode for that set of data
• What types of questions can you expect in the exam regarding mean, median, and mode?

  • Calculating the mean
  • Finding the median
  • Determining the mode