THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 16

Essay

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A sample of 25 bottles is taken from the production line at a local bottling plant.Assume that the fill amounts follow a normal distribution.
-The length of time it takes a stock analyst to complete an evaluation of a company's earnings forecast is normally distributed with a mean of 6.7 hours.From looking at the time spent by an analyst evaluating 36 randomly selected stocks you find that the sample mean was 6.4 hours.If you are told that the probability of getting a sample mean this small or smaller is 0.10,what must the population standard deviation have been?

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Definitions:

Compound

A chemical substance made up of two or more different elements that are chemically bonded together in a fixed ratio.

Dimethylheptanoic Acid

denotes a hypothetical organic compound, potentially misnamed, suggesting a heptanoic acid derivative substituted with two methyl groups.

γ-hydroxypentanoic Acid

An organic compound characterized by a five-carbon chain with a hydroxyl group attached to the third carbon and a carboxylic acid group at the end.

γ-hydroxy-γ-methylbutyric Acid

An organic compound, structurally related to β-hydroxy-β-methylbutyrate (HMB), and is involved in the biosynthesis and metabolism of fatty acids.