The area under the curve between Z= -1.88 and Z=2.10 can be calculated as;
P( -1.88 < Z < 2.10)
= area between 0 and -1.88 + area between 0 and 2.10
By using the area table;
Value of at -1.88 = 0.4699
Value of Z at 2.10 = 0.4821
= 0.4699 + 0.4821
= 0.952
P( -1.88 < Z < 2.10)
= area between 0 and -1.88 + area between 0 and 2.10
By using the area table;
Value of at -1.88 = 0.4699
Value of Z at 2.10 = 0.4821
= 0.4699 + 0.4821
= 0.952