TABLE 9-3 An Appliance Manufacturer Claims to Have Developed a Compact Microwave

question 161

Multiple Choice

TABLE 9-3
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W.
-Referring to Table 9-3, the parameter of interest is

• A) the mean power consumption of the 20 microwave ovens.
• B) the mean power consumption of all such microwave ovens.
• C) 250.
• D) 257.3.

---

Definitions:

Secondary Data

Information that has been previously collected and is available for use by others, often used in research to save time and resources.

Primary Data

Data collected firsthand for a specific research purpose, directly from the source.

Individual Interviews

One-on-one conversations between a researcher and a participant, aimed at gathering in-depth information on a topic.

Focus Groups

A research method where a small, diverse group of people discuss their perceptions, opinions, beliefs, and attitudes towards a product, service, concept, advertisement, idea, or packaging.