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2 Statistics

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Question 225

A student calculates the percentage of employed people travelling by train for four Local Authorities from the OCR large data set.

Local AuthorityTrain countEmployed totalPercentage entered
A18652278940.818
B828490141.69
Cmissing918770
D469377671.24
a.

Explain why the entry for C should be treated as missing rather than zero.

[2]
b.

State two checks that should be made before graphing the percentages.

[2]
Markscheme

2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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