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its applied engineering data analysis course

Q2 A standard normal variable has a mean of zero and a variance of 1 ie. Z* N(0, 1). SKETCH THE AREA and find the following z that fulfills the probability: 1. P(Zsz) -0.1 2. P(Z2z or Zs-z) -0.1 3. At what value of z, the area to the right is 2.5%? 4. At what value of z, the area between-z and z is 68%?

math   Statistics-And-Probability   
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