Representation of data

• What is the standard way of finding the lower outliar boundary?

  Q1 - (1.5 x IQR)
• What is the standard way of finding the upper outliar boundary?

  Q3 + (1.5 x IQR)
• When do we use histograms for data?

  When the data is continuous
• How do you calculate the frequency density for histograms?

  Frequency / class width
• What does the area equal to in histograms?

  Frequency x k (k being a constant scale factor)
• What are the two comparisons you want to make when it asks you to compare two types of data?

  • One measure of location
  • One measure of spread