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

question 12

Essay

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 p-value of the test is ________.

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Definitions:

Arsenic

A naturally occurring metallic element with the symbol As and atomic number 33, known for its toxicity and used in pesticides, herbicides, and insecticides.

Ground Water

Water held underground in the soil or in pores and crevices in rock.

Equilibrium

A state in a chemical reaction where the rates of the forward and reverse reactions are equal, leading to no net change in the concentration of reactants and products.

Arsenopyrite

A metallic gray, natural mineral compound of arsenic, iron, and sulfur, often associated with the occurrence of gold.