Explore BrainMass

Confidence Level and Hypothesis Testing

A trans-oceanic airline conducted a study to determine whether the average weight of baggage checked by a passenger differs significantly from 45 pounds. A random sample of 25 passenger baggages recorded a mean weight of 43.5 pounds with a standard deviation 6 pounds. Can the airline conclude that the mean weight of checked baggage is significantly different from 45 pounds at a 95% level of confidence?

Solution Preview

x-bar = 43.5, s = 6, n = 25, alpha = 0.05, mu = 45

H0: The average weight of the baggage is not significantly different from 45 and

Ha: The ...

Solution Summary

Neat and step-by-step work leading to the decision.