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

question 110

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 appropriate hypotheses to determine if the manufacturer's claim appears reasonable are

• A) H₀: μ = 250 versus H₁: μ ≠ 250.
• B) H₀: μ ≥ 250 versus H₁: μ < 250.
• C) H₀: μ ≤ 250 versus H₁: μ > 250.
• D) H₀: μ ≥ 257.3 versus H₁: μ < 257.3.

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A series of thoughts, images, and sensations occurring in a person’s mind during sleep, often associated with rapid eye movement (REM) sleep.

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Caffeine

A stimulant found in coffee, tea, and various foods and drinks that affects the central nervous system, increasing alertness.

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