Score: 0 of 1 pt 12 of 20 (17 complete) HW Score: 56.57%, 11.31 of 20 pts 12.1.2

Question

Score: 0 of 1 pt 12 of 20 (17 complete) HW Score: 56.57%, 11.31 of 20 pts 12.1.25 Question Help According to a census company, 10.1% of all babies born are of low birth weight. An obstetrician wanted to know whether mothers between the ages of 35 and 39 years give birth to a higher percentage of low-birth-weight babies. She randomly selected 240 births for which the mother was 35 to 39 years old and found 28 low-birth-weight babies. Complete parts (a) through (c) below. Click the icon to view the chi-square distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. (a) If the proportion of low-birth-weight babies for mothers in this age group is 0.101, compute the expected number of low-birth-weight births to 35-to 39-year-old mothers. What is the expected number of births to mothers 35 to 39 years old that are not low birth weight? The expected number of low-birth-weight births to 35-to 39-year-old mothers is The expected number of births to mothers 35 to 39 years old that are not low birth weight is Round to two decimal places as needed.)

Explanation / Answer

a) expected number of low birth weight births =np=240*0.101=24.24

expected number of births that are not low birth weight =np=240*(1-0.101)=215.76

( please revert if there are other parts of this)

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