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0 | mathxl.com/Student/PlayerHome MAT220 33 Statistics I [MOD2B ONLINE (1023-12/17/17) Homework: UNIT 4 Section 7.2 Homework Score: 0 of 1 pt to of 1209 complete) HW Score: 37.5%, 4.5 or 12 pts Question 10, 7.2.39-T Questor,Help * The number of chocolate chips in an 18.ounce bag af chocolate chp cookoes is approximately rormaly dstrbuled with a mean of 1252 chips and standard deviation 129 ckps la) What is the probabilty that a randomly selecled bag contains between 1100 and 1400 chocolate chips, inclusve? Ib) What is the probaberty that a randomly selected bag contains tewer than 1125 chocolare chips? c) Wh proportion of bags contans more than 1 200 choolatn tips? Id) what s the percenblo rank of a bag that contans 1025 chocolate chps? (a) The probabity that a fadonly selected bag contare between 1 100 and 1400 chocolalo chipsnchsves Round to four decimal pisces as needed)

Explanation / Answer

Given that mean = 1252 and s = 129

(a) P(1100<X<1400) = P((1100-1252)/129<Z<(1400-1252)/129)

P(-1.18<Z<1.15) = 0.7559

(b) P(X<1125)

P(Z<-0.9845) = 0.1635

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