A manual of rice seed health testing - IRRI books - International Rice ...
A manual of rice seed health testing - IRRI books - International Rice ...
A manual of rice seed health testing - IRRI books - International Rice ...
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proportion, by p. ˆ Any estimate <strong>of</strong> the<br />
proportion <strong>of</strong> infected <strong>seed</strong>s can<br />
vary from the true proportion due to<br />
sampling variation. The estimated<br />
sampling variation based on the formula<br />
p ˆ (1-p)/n ˆ at varying sample<br />
size (n) and proportion <strong>of</strong> infected<br />
<strong>seed</strong>s is computed and shown in<br />
Table 4.1. As sample size increases,<br />
sampling variation decreases. As the<br />
true proportion <strong>of</strong> infected <strong>seed</strong>s approaches<br />
50%, sampling variation<br />
increases. When the true proportion<br />
<strong>of</strong> infected <strong>seed</strong>s is relatively low<br />
(i.e.,