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A random sample of 12 ballistic missiles are taken in a study of the Fluid Dynamics...

A random sample of 12 ballistic missiles are taken in a study of the Fluid Dynamics under Wind Tunnel.
Measurements on the Normalized Reynolds Coefficient are made for each of the 12, yielding an average value of
48.50 with a sample standard deviation of 1.5. Assuming the measurements to be normally distributed, construct a
90% confidence interval for the mean Normalized Reynolds Coefficient.

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