Question

Sketch the area under the standard normal curve over the indicated interval and find the specified...

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

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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

  

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