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DAILY 5
1)
I know that, z = (X-mean)/(sd/sqrt(n))    
z1 = (3-3)/2.21/sqrt(700))    
z1=    0.0000
z2 = (4-3)/2.21/sqrt(700))    
z2=    11.9717
    
Hence,    
P(3 < X < 4)    
= P(X<4) - P(X<3)    
= P(Z<11.9717) - P(Z<0)    
= NORMSDIST(11.9717) - NORMSDIST(0)    
0.5000    
2)
I know that, z = (X-mean)/(sd/sqrt(n))    
z1 = (2-3)/2.21/sqrt(700))    
z1=    -11.9717
z2 =...