SOLUTION: A plant produces steel sheets whose weights are known to be normally distributed with a standard deviation of 2.4 kg. A random sample of 36 sheets had a mean weight of 31.4 kg. Fin
Algebra.Com
Question 1176425: A plant produces steel sheets whose weights are known to be normally distributed with a standard deviation of 2.4 kg. A random sample of 36 sheets had a mean weight of 31.4 kg. Find a 99% confidence limits for the population mean.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
CI half interval is z(0.995)*sigma/sqrt(n)
=2.576*2.4/sqrt(36)
=1.03
the 99%CI is (30.4, 32.4) units kg
RELATED QUESTIONS
The distribution of weights in a large group is approximately normally distributed. The... (answered by stanbon)
a manufacturing process produces items whose weights are normally distributed . it is... (answered by rothauserc)
A large shipment of watermelons has weights that are normally distributed with a standard (answered by stanbon)
A company produces steel rods. The lengths of the steel rods are normally distributed... (answered by Boreal)
A company produces steel rods. The lengths of the steel rods are normally distributed... (answered by MathLover1,math_tutor2020)
A company produces steel rods. The lengths of the steel rods are normally distributed... (answered by Theo)
A company produces steel rods. The lengths of the steel rods are normally distributed... (answered by stanbon)
a company produces steel rods. THe lengths of the steel rods are normally distributed... (answered by Alan3354)
a company produces steel rods. THe lengths of the steel rods are normally distributed... (answered by Theo)