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Same question n=80, xbar=85.3, (summation minus xbar)2=2508.8, Ho:mean=86.2, H1:mean <86, with signing level 10%

Same question n=80, xbar=85.3, (summation minus xbar)2=2508.8, Ho:mean=86.2, H1:mean<86, with signing level 10%

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