SOLUTION: The mean number of flaws per square yard in a type of carpet material is claimed to be 2.2 flaws per square yard along with a standard deviation of 1.2 flaws per square yard. The

Question 885363: The mean number of flaws per square yard in a type of carpet material is claimed to be 2.2 flaws per square yard along with a standard deviation of 1.2 flaws per square yard. The population can be assumed to be normal. Find x0 such that P(X ≤ x0) = 0.9780 is true, ie find the value of x0 that can be inserted into the blank that makes this statement true:�97.8% of the time, there are fewer than ______ flaws per square yard.�
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
invNOrm(.9780) = 2.014
2.014 = (X - 2.2)/1.2
1.2(2.014) + 2.2 = X = 4.6168
97.8% of the time, there are fewer than 4.6168 flaws per square yard
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