Crawford Industries Purchases Step-Down Electrical Converters from Two Suppliers

question 36

Multiple Choice

Crawford Industries purchases step-down electrical converters from two suppliers.The converters from the two suppliers appear to have the same average life (measured in hours) but the variability in useful life appears be different for the the two suppliers.In random samples of 9 converters from supplier A and 9 converters from supplier B, the variance in thesample A was 600; the variance in the sample B was 2800.Assume that the life of the converters is normally distributed in each population.Test the hypothesis that the variances of the two populations are equal, using a significance level of 2%.Report the F statistic (F_stat) for the test.

• A)3.160
• B)6.178
• C)4.667
• D)2.965

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Definitions:

Amino Acid

Organic compounds that serve as the building blocks of proteins, playing critical roles in biological processes.

Eukaryotic mRNA

Messenger RNA in eukaryotes, which is synthesized from DNA and carries genetic information from the nucleus to the ribosome for protein synthesis.

Half Life

The time required for half of the atoms in a sample of a radioactive element to decay into a different isotope or element.

mRNA Degradation

The process of breaking down messenger RNA molecules, which is crucial for controlling the levels of specific proteins produced within cells.