Do ath 227 Statistics Fall 2018 Erika Balbuena 9/24/18 7:13 PM lomework: Section

Question

Do ath 227 Statistics Fall 2018 Erika Balbuena 9/24/18 7:13 PM lomework: Section 3.4 & 3.5 Homework core: 0 of 1 pt 2 ot 29 (22 0compete) Hw score: 52.7%, 27.93 of 53 pt. 3.4.5 E Question Help O Suppose babies bom afer a gestation period of 32 to 35 weeks have a mean weight of 2800 grams and a standand deviation of 600 grams while babies bom after a gestation peniod of 40 weeks have a mean weoight of 3300 grams and a standard d weighs less relative to the gestation peried? at 430 grams. If a 34-week gestation period baby weighs 2450 grams and a 40woek gestasion period bably weighs 2950 grams, find the coressonding z-scores. Which baty Round to two decimal places as needed.) O A. The baby bom in week 34 weighs relatively loss sinoe its z-score. 11. is smailer than the z-scoe of for the baby bom in week 40 O B. The baby bom in wnek 40 weighes relatively less since its z-score., s smaler than the zscore of l for the bay bom in weok 34 O C. The baty bom in wook 34 weigha relatwely less sirce ts zcore,I1eco offorth baby borm in wsk D. The baby born nweek 40 weghs relaSvely less since hs zsore, is larger than the z-score of for the baby born in week 34

Explanation / Answer

as we know that z score =(X-mean)/std deviation

z score for 34 week gestation period baby=(2450-2800)/600=-0.58

z score for 40 week gestation period baby=(2950-3300)/430=-0.81

option B is correct

the baby bormn in week 40 weighs relatively less since its z score -0.81 is smaller than the z score of -0.58 fr the baby born in week 34

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