The figure below shows thestandard normal distributionfrom statistics, which is given by the following equation.

Statistics books often contain tables such as the following (below right), which show the area under the curve from 0 tobfor various values ofb.

bArea1.34132.47723.49874.5000Use the information given in the table and the symmetry of the curve about they-axis to find the following.

(a) =

(b) =

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