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Topic: Statistical Measures (Higher - Unit 1)

Specification References: S4.2

S4.2 Look at data to find patterns and exceptions.


Candidates should be able to:

  • find patterns in data that may lead to a conclusion being drawn
  • look for unusual data values such as a value that does not fit an otherwise good correlation

Notes

A formal treatment of outliers, for example in box plots, will not be tested.

Examples

  1. Jerry has a hypothesis that most days at his house are dry.
    In June there were 20 dry days at his house.
    Give a reason why this may not support Jerry’s hypothesis.

view more examples

  1. (from a scatter diagram)
    Circle the point that does not seem to follow the pattern of the rest of the data.

  2. The data shows the number of passengers on bus services during one day.

    29   45   43   38   29   21   14   12   11   7    12
    17   22   31   37   43   45   45   38   27   21   15

    Buses are every 30 minutes from 7 am.

    1. What time was the bus with the fewest passengers?
    2. Estimate the time of:
      1. the morning rush hour
      2. the afternoon rush hour
    3. Give a reason why you chose the times in part (b).