Question

10. The probability that a standard normal random variable Z takes a value in the unior of intervals (--, -a) Ulo, --), which arises in applications, will be denoted PIZS-a or Z 2 a). Use Figure 12.2 "Cumulative Normal Probability" to find the following probabilities of this type. Sketch the density curve with relevant regions shaded to illustrate the computation. Because of the symmetry of the standard normal density curve you need to use Figure 12.2 "Cumulative Normal Probability" only one time for each part. a. PZ <-2.58 or Z>2.58) b. PIZ-2.81 or Z> 2.81) C. PIZ-1.65 or Z> 1.65) d. PIZ<-2.43 or Z> 2.43)

only need help with #12. sorry for the other photo

Answer 1

Running of bus is uniforming distributed between 0 min 15 min, so, fia) = 1 15-0 0 LX215 IS 15 - 10 plx>10) Dj 0.3333 15 IS