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.

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Definitions:

Sleep Disorder

A condition that disrupts normal sleep patterns, leading to distress and affecting daytime functioning.

Narcolepsy

A chronic sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep.

REM Sleep Behaviour Disorder

A sleep disorder in which individuals physically act out vivid, often unpleasant dreams with vocal sounds and sudden, often violent arm and leg movements during REM sleep.

Vivid Dreams

Dreams that are particularly vivid are intensely detailed, engaging, and may be remembered upon awakening.