"A survey of 89 students found that 39% were in favor of raising tution to pave...."

raubsjosh

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"A survey of 89 students found that 39% were in favor of raising tution to pave...."

[FONT=&quot]A survey of 89 students found that 39% were in favor of raising tution to pave new parking lots. The standard deviation of the sample proprortion is 8.4%. How large a sample (to the nearest person) would be required to reduce this standard deviation to 6.8%?[/FONT]
 
A survey of 89 students found that 39% were in favor of raising tution to pave new parking lots. The standard deviation of the sample proprortion is 8.4%. How large a sample (to the nearest person) would be required to reduce this standard deviation to 6.8%?
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