Math

StatisticsQ&A LibraryTwins Twins are often born after a pregnancy that lastsless than 9 months. On the next page is a graph from theJournal of the American Medical Association (JAMA)showing the rate of preterm twin births in the United States over the past 20 years. In this study, JAMA catego-rized mothers by the level of prenatal medical care they received: inadequate, adequate, or intensive.a) Describe the overall trend in preterm twin births. b) Describe any differences you see in this trend, depend-ing on the level of prenatal medical care the mother received.c) Should expectant mothers be advised to cut back onthe level of medical care they seek in the hope ofavoiding preterm births? Explain.a) Create a linear model and predict the number ofgallons that will be available in 2005.b) The exam then asked students to estimate the yearwhen leaded gasoline will first become unavailable,expecting them to use the model from part a to answerthe question. Explain why that method is incorrect.c) Create a model that would be appropriate for that task,and make the estimate.d) The “wrong” answer from the other model is fairlyaccurate in this case. Why?Start your trial now! First week only $4.99!*arrow_forward*

Question

Twins Twins are often born after a pregnancy that lasts

less than 9 months. On the next page is a graph from the

Journal of the American Medical Association (JAMA)

showing the rate of preterm twin births in the United

less than 9 months. On the next page is a graph from the

Journal of the American Medical Association (JAMA)

showing the rate of preterm twin births in the United

States over the past 20 years. In this study, JAMA catego-

rized mothers by the level of prenatal medical care they

rized mothers by the level of prenatal medical care they

received: inadequate, adequate, or intensive.

a) Describe the overall trend in preterm twin births.

a) Describe the overall trend in preterm twin births.

b) Describe any differences you see in this trend, depend-

ing on the level of prenatal medical care the mother

ing on the level of prenatal medical care the mother

received.

c) Should expectant mothers be advised to cut back on

the level of medical care they seek in the hope of

avoiding preterm births? Explain.a) Create a linear model and predict the number of

gallons that will be available in 2005.

b) The exam then asked students to estimate the year

when leaded gasoline will first become unavailable,

expecting them to use the model from part a to answer

the question. Explain why that method is incorrect.

c) Create a model that would be appropriate for that task,

and make the estimate.

d) The “wrong” answer from the other model is fairly

accurate in this case. Why?

c) Should expectant mothers be advised to cut back on

the level of medical care they seek in the hope of

avoiding preterm births? Explain.a) Create a linear model and predict the number of

gallons that will be available in 2005.

b) The exam then asked students to estimate the year

when leaded gasoline will first become unavailable,

expecting them to use the model from part a to answer

the question. Explain why that method is incorrect.

c) Create a model that would be appropriate for that task,

and make the estimate.

d) The “wrong” answer from the other model is fairly

accurate in this case. Why?

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