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Data handling and analysis

Data handling and analysis

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Question 120

To investigate the effect of a chemical retardant on concrete curing, engineers measured the 28-day compressive strength of 11 test blocks (labelled A – K) prepared with varying concentrations of the retardant.

Table 2: The concentration of chemical retardant (in g/L) used in each test block and their corresponding 28-day compressive strength (in MPa).

ABCDEFGHIJK
Retardant concentration (g/L)12111087654320
Compressive strength (MPa)2121222527313438424549

Explain why the median would be more suitable than the mode to represent the average compressive strength for these concrete blocks.

[2]
Markscheme

Data handling and analysis Questions

  1. A Level
  2. /Psychology
  3. /Data handling and analysis

235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.

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