SOLUTION: . The sales in a store are normally distributed with a mean of $10,000 and a standard deviation of $2000. a. What percentage of sales are greater than $13,000? b. What per

Question 1191131: . The sales in a store are normally distributed with a mean of $10,000 and a standard deviation of $2000.
a. What percentage of sales are greater than $13,000?
b. What percentage of sales are less than $8,000?
c. What percentage of sales are between $8,000 than $12,000?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
so a is z>1.5 or 6.68%
b. is z < -1 or 15.87%
c. is -1 <=z <=+1 or 68.27%
Calculator 2nd VARS2 normal cdf(-1,1) ENTER for c.
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