Question 662168
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Hi,
µ = 73.16 inches and  &#963; = 6.39 
A random sample of 70 heights is obtained...
 m = 73.16in  and s = {{{6.39/sqrt(70)}}}
 P(<span style="text-decoration: overline">x</span> = 74.5) = {{{P(z=(74.50-73.16)/(6.39/sqrt(70)))}}}