TOM302 HW ch3 - 0.1736 b(497-457/80=0.5(537-457/80=1...

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TOM302 HW #3 7.21 a. P(0.00<= Z<=1.10) using standard normal table: 0.3643-0 = 0.3643 b. P(z>=1.10) 0.5-0.3643= 0.1357 c. P(z<=1.35) P(z=1.35)=0.4115 0.5+0.4115= 0.9115 7.25 a. using the standard normal table…0.52 b.2.05 c.0.54-0.5= 0.04..using the standard table 0.10 d. 0.5-0.3= 0.2..using the standard table 0.52 7.46 µ=420*0.54 =226.8 δ=10.214 z= (419.5-419.0)/10.214 =0.0489 0.5-0.0489 = 0.4511 7.66 N=457 δ=80 a. P(x>=382) (382-457)/80=-0.94 0.5-0.3264=
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Unformatted text preview: 0.1736 b. (497-457)/80=0.5 (537-457)/80=1 0.3413-0.1915= 0.1498 c.z=-1.96-1.96=(w-457)/80 W=300.2 d. z=0.475 0.475=(w-457)/80 W=495 7.70 a. P(x<=1600) (1600-1935)/400=-0.55 0.5-0.2088= 0.2912 b. P(2200<=x<=2400) (2200-1935)/400=0.66 (2400-1935)/400=1.16 When 2200, z=0.2454… when 2400, z=0.3770 0.3770-0.24454= 0.1316 c.z=0.845 0.845=(w-1935)/400 W=2273 d. z= 0.255 0.255=(w-1935)/400 W=2037...
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