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