Lesson 6: Exploring Descriptive Statistics

• Descriptive statistics

  Describes what the data shows. Summarizes the bulk of the data into a single measure
• not arranged/organized data

  raw or ungrouped data
• Data's that are arranges in an ascending or descending form.

  Array
• highest value minus the lowest value (divided by how many classes given to get the interval)

  range
• Also known as midpoint

  Class Mark
• The number between the upper class limit and lower class limit (The average of the ucl and lcl)

  class mark
• $<cb =$$(-0.5)$

  lower class boundary
• $>cb =$$(+0.5)$

  Upper class boundary