Question 458189
{{{mu=np=15*0.7=10.5}}}
{{{sigma=sqrt(n*p*q)=sqrt(15*.7*.3)=1.77}}}
15C6*.7^6*.3^9=.0116 area of binomial rectangle for 6.
z=(6.5-10.5)/1.77=-2.26
area of tail under normal curve=.0119
z=(5.5-10.5)/1.77=-2.82
area of tail under normal curve=.0024
.0119-.0024=.0095 area under the normal curve for 6.
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Ed