Sampling Plans
Suppose that an experimenter wishes to take observations from a distribution for which ะhe p.f. or the p.d.f. is f in order to gain information about the value of the parameter 0. The experimenter could simply take a random sample of a predetermined size from the distribution. Instead. however, he may begin by first observing a few values at random from the distribution. and noting the cost and the time spent in taking these observations