First, DEA permits a sample of N hospitals (j = 1, 2,..., N) each producing m outputs (y j = (y1 j, y2 j,..., y mj )) from n inputs (x j = (x ij, x2 j,..., x nj )).
At the Earnley Concourse in Chichester, West Sussex, Summer Activity Week, which permits a sampling of courses, costs $672 for tuition, room and three meals.
Therefore, subsequent analyses (ANOVA and regression) present results using only parent survey responses to permit a larger sample size (particularly children < 10 years of age, who did not complete a survey).
This number of panellists was considered sufficient to permit a diverse sample and also provide an opportunity for panel members to be involved in the group discussion in Round 2. 28 We used purposive sampling across a range of factors (see table 1) to maximise the opportunity for a diverse range of perspectives and expertise.
It is known that this procedure permits a smaller sample size for a given power, but as small samples sizes are more prone to variability, this may lead to concealed bias.
For example, photo-responsive gels can be 'molded' by light into various three-dimensional shapes, permitting a single sample to have multiple uses.
Participants then permitted a serum sample collection, which was preserved at −80°C.
We analysed nationwide data from Denmark and Sweden, which permitted a large sample size; this was advantageous because many of the outcomes studied are rare and therefore not possible to study in a clinical trial.
This is moreover important for clinical trials in which an index discriminating patients achieving remission from those who did not might increase the power of the statistical comparisons, thus permitting a smaller sample size, 27 a crucial factor in orphan and ultra-orphan diseases such as HRFs.
Limiting sampling to oral swabs reduces sensitivity; however, the savings in time and cost would permit a greater number of samples to be collected and tested.
