<PRE><B>Question 250453</B>
the proportion of junior executives leaving large manufacturing companies within three years is to be estimated within 3 percent. The .95 degree of confidence is to be used. A study conducted several several years ago revealed that the percent of junior executives leaving within three years was 21. To update this study, the files of how many juniors exectives should be studied?
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n = (z/E)^2*(p*q)
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n = (1.96/0.03)^2*0.21*0.79 = 708.13
Rounding up you get 709
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Cheers,
Stan H.



 
a. 594
b. 612
c. 709
d. 897
</PRE>