Question
A sociologist wants to study the proportion of 12-year-olds who have their own cell phones. What size sample should be obtained if the wish is
A sociologist wants to study the proportion of 12-year-olds who have their own cell phones. What size sample should be obtained if the wish is for the estimate to be within 3.3 percentage points with 99% confidence if:
(a) they use a prior study that found that 72% of 12-year-olds have their own cell phones?
(b) no prior estimates are used?
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Euclidean Geometry And Transformations
Authors: Clayton W Dodge
1st Edition
0486138429, 9780486138428
