Population standard error - O / JM = 12 / 136 =2 mean age (u) = 30 st dev (7) = 12 26.08 33.92 Z
Population standard error - O / JM = 12 / 136 =2 mean age (u) = 30 st dev (7) = 12 26.08 33.92 Z = +1.96 random sample Z =-1.96 of 36 people 95% ages recorded 24 26 28 30 32 34 36 z =-3 z=-2 z=-1 z=0 z=+1 z=+2 z=+3 sample mean calculated 95% ME 95% ME
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