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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 91

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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Independent samples of math scores from students in the U.S.and Europe were collected from normal populations.A sample of 50 students from the U.S.had an average score of 570 while a sample of 50 European students had an average score of 540.The population standard deviations for the average scores of the US and European students are 102 and 115 respectively.
-What is the lower confidence limit of the 95% confidence interval for the difference between the population means?

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Definitions:

Unlike Poles

Refers to the north and south poles of magnets; when magnets have poles facing each other that are different, they attract.

Like Poles

Magnetic poles of the same kind (either both north or both south), which repel each other according to magnetic principles.

Electromagnet

A type of magnet where the magnetic field is produced by an electric current, typically through a wire wound into a coil around a magnetic core.

Magnetic Field

An invisible field around magnetic materials where magnetic forces are exerted and can be detected by other magnetic materials or moving electric charges.

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