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Topic: Representing Data (Foundation - Unit 1)

Specification References: S4.4

S4.4 Compare distributions and make inferences.


Candidates should be able to:

  • compare two diagrams in order to make decisions about an hypothesis
  • compare two distributions in order to make decisions about an hypothesis by comparing the range and a suitable measure of average such as the mean or median.

Notes

Any of the charts and diagrams from S3.2 could be used as a basis for comparing two distributions.

Examples

  1. The table shows the gender of pupils in each year group in a school.

    Gender / Y 7 8 9 10 11
    Male 82 89 101 95 92
    Female 75 87 87 99 101

    Compare the data for the boys with the data for girls.

view more examples

  1. 19 runners complete a marathon.
    The times of the professional athletes are (in minutes):

    133    134    136    139    141    143    144    145    151    158

    The times of the amateur athletes are (in minutes):

    139    147    151    152    159    161    167    178    182

    Compare the times of the two groups of athletes.

  2. The table shows the number of diners at each hotel table at 8 pm on Monday night and 8 pm on Friday night.

    8pm Monday night 8pm Friday night
    Number Frequency   Number Frequency  
    0 18   0 0  
    1 2   1 0  
    2 3   2 16  
    3 1   3 2  
    4 1   4 5  
    6 0   6 2  

    Compare the numbers at tables at these times.