An Electronics Store Receives a Shipment of Eight Boxes of Calculators

question 74

Multiple Choice

An electronics store receives a shipment of eight boxes of calculators. Each box contains ten calculators. A quality control inspector chooses a box by putting eight identical slips of paper numbered 1 to 8 into a hat, mixing thoroughly and then picking a slip at random. He then chooses a calculator at random from the box selected using a similar method with ten slips of paper in a hat.
He repeats the process until he obtains a sample of 5 calculators for quality control testing. Does this sampling plan result in a random sample? Simple random sample? Explain.

• A) No; yes. The sample is not random because not all calculators have the same chance of being selected. It is a simple random sample because all samples of 5 calculators have the same chance of being selected.
• B) Yes; no. The sample is random because all calculators have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample containing 5 calculators from the same box.
• C) Yes; yes. The sample is random because all calculators have the same chance of being selected. It is a simple random sample because all samples of 5 calculators have the same chance of being selected.
• D) No; no. The sample is not random because not all calculators have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample containing 5 calculators from the same box.

Understand the importance of dual-voltage power supplies and their utility in various scenarios.

Identify and explain the units of measurement used for rating power supplies.

Recognize the appropriate tools and safety equipment to use in potentially hazardous working environments.

Identify sources for disposal instructions of hazardous materials.

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Definitions:

At-Risk Drinking

Alcohol consumption patterns that increase the likelihood of developing health problems or compound existing ones.

Alcoholic Drinks

Beverages containing ethanol, a type of alcohol produced by fermenting grains, fruits, or other sources of sugar.

Tolerance

The body's reduced response to a drug after prolonged use, requiring an increased dosage to achieve the original effect.

Illicit Substance

A substance whose production, sale, or use is prohibited by law.