Quiz: Chapter 7 QUIZ: The Normal and Other Continuous This Question: 3 pls This
ID: 3362682 • Letter: Q
Question
Quiz: Chapter 7 QUIZ: The Normal and Other Continuous This Question: 3 pls This Quiz: 27 pts possib's bicyces arive ata bike shop in boxes. Before they can be sold, they munparkad aamalad, nd tuned lubricated adjuated ctc. Based on past eoxeience, the h an SD Asembty 23. 24 model, and th andard deaan ofthe Tuning 133 25 a) and b bi A customer dackics te buy onco dply madels but wants a direrent celor. The shphas cne, 2tl n the box. The manageray ther can hae ready in hat an hour Do you thirk the blke wil be t up andrdy togo a promlcd? Cxplai OH. No, the probability tha the bike wilbe ready in half an houri Cick to select your are.Explanation / Answer
a)
mean = mean(unpacking) + mean(assembly) + mean(tuning)
mean = 3.4 + 23.4 + 13.3
mean = 40.1
SD = sqrt(SD(unpacking) + SD(assembly) + SD(tuning))
SD = sqrt(0.6 + 2.4 + 2.5)
SD = 2.35
b)
P(X<30) = P(z < (30 - 40.1)/2.35) = P(z < -4.2978) = 0.0000
No, the probability that the bike will be ready in half an hour is 0
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