Carry your intermediate computations to at least four decima

Carry your intermediate computations to at least four decimal places. Round your answer to at least two decimal places

Solution

P(-c <= Z <= c) = 0.9545

=> P( Z <= c ) - P (z<= -c) = 0.9545

=> P( Z <= c ) - (1- P (z<= c)) = 0.9545

=> 2P( Z <= c ) - 1 = 0.9545

=> 2P( Z <= c ) = 1.9545

=> P( Z <= c ) = 1.9545/2 = 0.9772

From z table ,

c = 2.0 Answer