Question

Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area between z = −1.43 and z = 1.93 is

Answer 1

Solution :

Given that , The area between z = −1.43 and z = 1.93 is

=> P(-1.43 < Z < 1.93) = 0.8968

=> Sketch the curve :
  

=> P(-1.43 < Z < 1.93) = P(Z < 1.93) - P(Z < -1.43)

= 0.9732 - [1 − P(Z < 1.43)]

= 0.9732 - [1 − 0.9236] (from standard normal table)

= 0.8968