(B) fo.z foro
(B) fo.z foro
(B) fo.z foro
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Section I Saenple Exarslinat[on Two 43<br />
28. Two independent random samples of size nr= 45andnz= 38. r,vith respective standard<br />
deviations 6r=2.3 and dz= 1.8, are drawn from trvo normally distributed populations.<br />
Which of the <strong>fo</strong>llor,ving represents an estimate of the standard deviation of the sampling<br />
distribution corresponding to xt- x2?<br />
(A) 0.2s<br />
rB) 0.31<br />
(c) 0.4s<br />
(D) 0.s0<br />
(E) 2,05<br />
29. SRS refers to a simple random sample. Suppose an SRS of size n is drawn from a<br />
population. Which of the <strong>fo</strong>llowing accurately character\zes this sample?<br />
I. It is a sample drawn in such a manner so that every set of n subjects in the<br />
population has an equal chance to be the sample chosen.<br />
Il. It is a sample drawn in such a manner so that every subject has some chance<br />
of being chosen.<br />
III. It is a sample drawn in such a manner that every subject in the population has<br />
an equal chance of being selected.<br />
(A) I only<br />
(B) II only<br />
(C) III only<br />
(D) II and III only<br />
(E) I, II, and III<br />
nAnsrver<br />
Answer<br />
any part of thls Page ls illegal
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