Comparing two data distributions

Problem types

• Gap between means, in MADs
• Compare two box plots
• Which comparison is true?
• Compare two medians and two modes

Builds on

• Describing spread and outliers
• Median and spread of signed data · Earlier idea

  Median and interquartile range are used to compare two data sets by their centers and spreads.

Leads to

• Comparing center, spread, and shape
• Margin of error and what a sample supports
• Testing a difference by randomization · Extend the idea

  Comparing two groups by their means in units of spread extends to asking whether a difference could arise by chance in a randomization test.

Related skills

None listed.