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February 26, 2015

February 26, 2015

Posted by **takierr** on Monday, May 6, 2013 at 2:40pm.

a) 107 - 135

b)93 - 149

c) 79 - 163

- math -
**Steve**, Monday, May 6, 2013 at 2:51pm107 = µ-1σ

135 = µ+1σ

So, what % is within 1σ of µ? Your Z table says 68.27% of 400 or 273

Treat the other numbers similarly

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