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Mathematics 24 Online
OpenStudy (anonymous):

The area of rejecting null hypothesis in significant level of 5 percent is as the following: H0 : µ ≥ 18 , H1 : µ < 18 & Reject H0 when : 〖x ̅〗16 < 15.5 If x distribution is normal, how much is standard deviation of x?

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