Input Values 

This utility calculates a population or cluster level sensitivity for a survey where pooled sammpling
has been used. This is the probability
(or level of confidence) that one or more pools will give a positive result assuming the disease was present at a prevalence
greater than or equal to the specified design prevalence. It is assumed that individual units
are sampled and that samples are combined at random into a specified number of pools of equal size. Test
sensitivity and specificity are measured at the pool level, allowing for any dilution effect.
For more details see: Christensen & Gardner (2000). Herdlevel interpretation of test results for
epidemiologic studies of animal diseases. Prev Vet Med. 45:83106.
Inputs are:
 Design prevalence as a proportion;
 Pool sensitivity;
 Pool specificity;
 Pool size  the number of units represented in each pooled sample; and
 The number of pools tested.
Outputs are:
 Populationlevel sensitivity for the given pool size, number of pools, design prevalence and pool sensitivity and specificity.
