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Test scores on a course’s 2nd test have historically followed an X ~ NORM( 77, 8...

Test scores on a course’s 2nd test have historically followed an X ~ NORM( 77, 8 ) distribution. For the latest 2nd test, S=11.0 with n=30. Is this consistent with the variability of the historical distribution? Show supporting calculations and explanation

Math   Statistics-And-Probability   
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