Moving Companies Are Required by the Government to Publish a Carrier

question 80

Multiple Choice

Moving companies are required by the government to publish a Carrier Performance Report each year.One of the descriptive statistics they must include is the annual percentage of shipments on which a $50 or greater claim for loss or damage was filed.Suppose two companies, Econo-Move and On-the-Move, each decide to estimate this figure by sampling their records, and they report the data shown in the following table. $$\begin{array} { | l | c | c | } \hline & \text { Econo-Move } & \text { On-the-Move } \\\hline \text { Total shipments sampled } & 900 & 750 \\\hline \text { Number of shipments with a claim } \geq \$ 50 & 162 & 60 \\\hline\end{array}$$ The owner of On-the-Move is hoping to use these data to show that the company is superior to Econo-Move with regard to the percentage of claims filed.Which test would be used to properly analyze the data in this experiment?

• A)t test for the difference between two means
• B)F test for the ratio of variances
• C)Separate variance t test for the difference between two means
• D)Z test for the difference between two proportions

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