THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 58

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A supermarket chain has 25 stores in the North,30 in the South,50 in the Midwest,and 35 in the West.Using a proportional allocation of a random sample of 30% of the outlets,the manager records the following means and standard deviations.

-Find a 95% confidence interval for the population mean.

• A)142.69 ± 5.22
• B)142.69 ± 1.96
• C)142.69 ± 2.66
• D)142.69 ± 4.58

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Definitions:

Critical F Value

A statistic used in the analysis of variance (ANOVA) tests, indicating the value beyond which data can be considered statistically significant.

Sum Of Squares

A statistical measure that quantifies the dispersion or variance of a set of numbers, by summing the squared differences from the mean.

Observations

The act of noticing and recording something, typically as part of a scientific study or research project.

Test Statistic

A value derived from sample data during a hypothesis test, used to determine whether to reject the null hypothesis.