Distributions

• Frequency distributions


  How the data is distributed or spread out, often displayed using a graph like a histogram
• Histogram


  Used when data is continuous, with bars touching and having equal width, and a continuous variable on each axis
• Normal distribution


  A symmetrical spread of frequency data where the mean, median and mode are the same or almost the same and are located at the highest part
• Positive skew


  The skew (where the data is most spread out) is located on the right, with the mode at the highest point, the median next, and the mean highest
• Negative skew


  The skew (where the data is most spread out) is located on the left, with the mode at the highest point, the median next, and the mean lowest
• What is this?

  Normal distribution

  
• What is this?

  Positive skew

  
• What is this?

  Negative skew