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Confidence Level and Hypothesis Testing

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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?

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Confidence level and hypothesis testing is examined. Neat and step-by-step work leading to the decision.

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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 ...

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