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CHI-SQUAREThe chi-square test is used to determine whetherthere is a significant difference between theexpected frequencie...
No. ofDistance                          Expected               buses per                     (O-E) (O-E)2    (O-E)2/E  (km...
Average  Distance                Expected             Diameter offrom source              frequency (O-E) (O-E)2          ...
Distance                         Expected                Number offrom house                        frequency (O-E) (O-E)2...
The chi square test is used to determine whether
The chi square test is used to determine whether
The chi square test is used to determine whether
The chi square test is used to determine whether
The chi square test is used to determine whether
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The chi square test is used to determine whether

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The chi square test is used to determine whether

  1. 1. CHI-SQUAREThe chi-square test is used to determine whetherthere is a significant difference between theexpected frequencies and the observed frequenciesin one or more categories. Do the number ofindividuals or objects that fall in each category differsignificantly from the number you would expect? Isthis difference between the expected and observeddue to sampling error, or is it a real difference?
  2. 2. No. ofDistance Expected buses per (O-E) (O-E)2 (O-E)2/E (km) frequency (E) min (O) 0 10 1 5 2 3 3 2 ΣThe number of buses observed per minute in relation tothe distance from the city centre.
  3. 3. Average Distance Expected Diameter offrom source frequency (O-E) (O-E)2 (O-E)2/E pebbles (mm) (km) (E) (O) 0 100 1 60 2 20 3 20The relationship between the size of pebbles in a river inrelation to the distance from its source. Total
  4. 4. Distance Expected Number offrom house frequency (O-E) (O-E)2 (O-E)2/E cars seen (O) (km) (E) 0 52 1 53 2 51 3 44 The number of cars observed in relation to the distance from my house. Total

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