A truck rental company has a fleet of 80 trucks. Each truck has 8 tires. There...

A truck rental company has a fleet of 80 trucks. Each truck has 8 tires. There are a total of 640 tires. The company seeks to estimate the total number of tires that are defective. The company picks a simple random sample without replacement of 5 trucks from the 80 trucks. For each sampled vehicle, the number of defective tires is recorded. The following are the sample results: Vehicle truck1 truck2 truck3 truck4 truck5 Number of defective tires 2 1 3 0 3

(1) What is a sampling unit? How many sampling units are there?

(2) Estimate the number of tires that are defective. 3

(3) Give a bound on the error of estimation in Question (2).

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orchestra answered 1 year ago

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