SOLUTION: A company manufactures hockey sticks. It is known that the length of these hockey sticks is normally distributed with mean 92cm and a standard deviation 4cm. A sample of 30 hocke

Question 904991: A company manufactures hockey sticks. It is known that the length of these hockey sticks is normally distributed with mean 92cm and a standard deviation 4cm.
A sample of 30 hockey sticks is drawn. Calculate the probability that the sample mean will be between 91cm and 93 cm?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
z1 = (91-92)/4/sqrt(30)
z2 = (93-92)/4/sqrt(30)
P(91 >xbar< 93) = normalcdf(smaller z, larger z) = normalcdf(z1, z2)
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