Records on a Fleet of Trucks Reveal That the Average

question 69

Multiple Choice

Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 35,600 kilometres. A manufacturer of spark plugs claims that its plugs have an average life in excess of 35,600 kilometres. The fleet owner purchased 18 sets and found that the sample average life was 37,700 kilometres, the sample standard deviation was 2415 kilometres and the computed t = 3.677.

• A) Based on these findings, there is enough evidence to accept the manufacturer's claim at the 0.05 level.
• B) Based on these findings, there is NOT enough evidence to accept the manufacturer's claim at the

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Definitions:

Psychological Disorders

Mental disorders that significantly affect an individual's cognition, emotion regulation, or behavior.

Exorcism

A religious or spiritual practice of evicting demons or other spiritual entities from a person or an area they are believed to possess or inhabit.

Cruel Practices

Actions or activities that inflict unnecessary suffering or harm on others, often condemned by society as inhumane.