Same as 6.2 & 6.3 Except using proportions or % rather than mean

              (more like binomials)

 ,  and n           Use   as best Point estimate

  x =   #success  is sample proportion
                                p is population proportion

Standard Deviation of sample proportions
 

is like

for means

 

Margin of Error

 

Confidence Interval

 
     Round off - 3 significant digits

#6
 
 
 
 
 

#14
 
 
 
 
 
 
 
 
 
 

#24
 
 
 
 
 
 
 
 
 

Determining Sample Size
 
 

if have an estimate of   p

 
 

if no estimate of   p

#12
 
 
 
 
 
 
 
 
 
 
 
 

#16