Question 1012224
$6.11=mean
$1.87=SD
z>(10.00-6.11)/1.87=2.082
Proportion is 0.0188
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z for $5 is (5.00-6.11)/1.87=-0.5936
probability of z between -0.5936 and 2.082 is 0.7048
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90th percentile is z=1.282
Multiply by 1.87=2.40 above the mean.
$6.11+$2.40=$8.51