Zone | Number in sample (n) | Sample mean | SD of sample mean | 95% CIs of sample mean | Population mean | |
Lower limit | Upper limit | |||||
South Cambs. | 107 | 6.1 | 3.5 | 5.5 | 6.8 | 6.9 |
Huntingdonshire | 8 | 11.7 | 8.6 | 5.7 | 17.6 | 10.6 |
East Cambs. | 49 | 11.5 | 5.2 | 10 | 12.9 | 10.7 |
Cambridge City | 78 | 13.2 | 6.5 | 11.7 | 14.6 | 16.4 |
Fenland | 11 | 20.2 | 7.1 | 15.9 | 24.4 | 22.2 |