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When solving for the sample size required to estimate p to within a particular margin of error, under what circumstances do we use p? = .5?
a) When the margin of error desired is less than or equal to .5
b) When the computed value of p? = .5
c) When p? = .4 and 1 - p? = .6
d) When the variance is equal to .5 or when we desire a most conservative sample size.
e) When we have no prior information on the approximate value of p? or p.
f) None of the above
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