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I need questions i), B) and what are the degree of freedom. a mean u of approximately 75.F and standard deviation o of approximately 8.F.

I need questions i), B) and what are the degree of freedom.

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a mean u of approximately 75.F and standard deviation o of approximately 8.F. A 20-year study (620 July days) gave the entries in the rightmost column of the following table. III IV Observed Region under Expected % from Number of Days Normal Curve XF Normal Curve in 20 Years H - 30 s X

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