A Manufacturer Wants to Increase the Shelf Life of a Line

question 91

Essay

A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 216 days. After a revised mix has been developed, a sample of nine boxes of cake mix had a mean of 217.222 days and a standard deviation of 1.2019 days. At the 0.025 significance level, decide if the sample data support the claim that shelf life has increased. State your decision in terms of the null hypothesis.

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Definitions:

Aachen

A city in western Germany known for its historical significance as the residence of Charlemagne and the site of his Palatine Chapel, a masterpiece of Carolingian architecture.

Old Saint Peter's

A basilica that once stood on the spot where the Basilica of Saint Peter in Vatican City is located today, originally constructed during the 4th century.

San Vitale

An important early Christian Byzantine basilica in Ravenna, Italy, known for its rich mosaics and significance in the development of Byzantine architecture.

Palatine Chapel

A historic chapel in Aachen, Germany, serving as a part of the Aachen Cathedral and notable for its Carolingian architecture.