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A researcher wants to know if her classroom average is significantly different than the school average...

A researcher wants to know if her classroom average is significantly different than the school average on the standardized math test. Her classroom mean is 42 with 30 students, and a standard deviation was 3.1. The school mean is 40.

Calculate the test.

-19.35

2.56

3.53

Math   Statistics-And-Probability   
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Test statistic is 3.53.

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