Surveying roaming dog populations: guidelines ... - Animal Sheltering
Surveying roaming dog populations: guidelines ... - Animal Sheltering
Surveying roaming dog populations: guidelines ... - Animal Sheltering
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CONTENTS<br />
Annex 2<br />
t-Statistic<br />
INTRODUCTION<br />
COUNTING DOGS<br />
IN PUBLIC AREAS<br />
MONITORING ONCE<br />
INTERVENTION BEGUN<br />
CONCLUSIONS<br />
When calculating confidence intervals, the value you use to multiple the standard deviation of the<br />
estimate is called the t-statistic, use the table A2 below to select your value based on the number of<br />
blocks you have counted.<br />
Number of blocks counted t-statistic<br />
2 12.71<br />
3 4.303<br />
4 3.182<br />
5 2.776<br />
6 2.571<br />
7 2.447<br />
8 2.365<br />
9 2.306<br />
10 2.262<br />
11 2.228<br />
12 2.201<br />
13 2.179<br />
14 2.16<br />
15 2.145<br />
16 2.131<br />
17 2.12<br />
18 2.11<br />
19 2.101<br />
20 2.093<br />
21 2.086<br />
22 2.08<br />
23 2.074<br />
24 2.069<br />
25 2.064<br />
26 2.06<br />
27 2.056<br />
28 2.052<br />
29 2.048<br />
30 2.045<br />
31 2.042<br />
41 2.021<br />
51 2.009<br />
61 2<br />
More than 61 blocks 1.96<br />
Table A2. Shows t-statistics according to number of blocks counted. Multiply the standard deviation by the t-<br />
statistic to calculate the confidence interval.<br />
ANNEXES<br />
20
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