Question 6.PR.3: Use the data in Table 6.3 to see if there is a significant d...
Use the data in Table 6.3 to see if there is a significant difference between road casualties in quarters I and III on the one hand and quarters II and IV on the other.
| Table 6.3 Road casualties in Great Britain, 2006 | |||||
| Quarter | I | II | III | IV | Total |
| Casualties | 697 | 743 | 838 | 894 | 3172 |
\chi^{2}=3.28<3.84, the 95% critical value, hence no apparent difference between quarters I/III and II/IV.
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