When Testing for the Significance of the Difference Between Two

question 3

Multiple Choice

When testing for the significance of the difference between two sample means,which parameters must be estimated with sample values?

• A)the population standard deviations
• B)the population means
• C)the standard deviation of the sampling distribution
• D)the alpha value

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Definitions:

Random Sample

A smaller group selected from a broader group, ensuring each person has the same probability of selection.

Confidence Interval

With a certain probability, a specified interval in statistics presumed to include the actual value of a parameter from a population whose characteristics are not known.

Regular Unleaded Gasoline

A type of gasoline without lead additives, used in motor vehicles, that meets specific octane and emissions standards.

Gas Stations

Places where fuel for vehicles, such as gasoline or diesel, is sold to the public.