Records on a Fleet of Trucks Reveal That the Average

question 50

Essay

Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles; the sample standard deviation was 1,412 miles. To decide if the sample data support the company records that the spark plugs average 22,100 miles, state your decision in terms of the null hypothesis. Use a 0.05 level of significance.

---

Definitions:

Writ Of Execution

A court order authorizing the enforcement of a judgment, often by seizing and selling the debtor's property.

Court's Decree

An official order issued by a court that decides the outcome of a legal case.

Petitioner

An individual or entity that formally presents a request or application to a court or authoritative body for a legal judgment or action.

Appellant

A party who appeals a lower court's decision, seeking a review and potential reversal by a higher court.