Question

In: Math

Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random...

Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random sample of 131 pregnant women who were smokers. The average pregnancy length for this sample of smokers was 262 days. From a large body of research, it is known that length of human pregnancy has a standard deviation of 16 days. The researchers assume that smoking does not affect the variability in pregnancy length. Find the 95% confidence interval to estimate the length of pregnancy for women who smoke. (Note: The critical z -value to use, z c , is: 1.960) ( , ) Your answer should be rounded to 3 decimal places.

Solutions

Expert Solution

Solution :

Given that,

= 262

= 16

n = 131

At 95% confidence level the z is ,

= 1 - 95% = 1 - 0.95 = 0.05

/ 2 = 0.05 / 2 = 0.025

Z/2 = Z0.025 = 1.96

Margin of error = E = Z/2* ( /n)

= 1.96 * (16 / 131)

= 2.740

At 95% confidence interval estimate of the population mean is,

- E < < + E

262 - 2.740 < < 262 + 2.740

259.260 < < 264.740

(259.260, 264.740)

milcah answered 1 year ago
Next > < Previous

Related Solutions

Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random...
Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random sample of 111 pregnant women who were smokers. The average pregnancy length for this sample of smokers was 262 days. From a large body of research, it is known that length of human pregnancy has a standard deviation of 16 days. The researchers assume that smoking does not affect the variability in pregnancy length. Find the 99% confidence interval to estimate the length of...
Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random...
Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random sample of 148 pregnant women who were smokers. The average pregnancy length for this sample of smokers was 262 days. From a large body of research, it is known that length of human pregnancy has a standard deviation of 16 days. The researchers assume that smoking does not affect the variability in pregnancy length. Find the 95% confidence interval to estimate the length of...
In this exercise you will investigate the relationship between birth weight and smoking during pregnancy The...
In this exercise you will investigate the relationship between birth weight and smoking during pregnancy The following table contains data for a random sample of babies born in Pennsylvania in 1989. The data includes the​ baby's birth weight together with various characteristics of the​ mother, including whether she smoked during her pregnancy. Download the data from the table by clicking the download table icon A detailed description of the variables used in the data set is available here Use a...
A study was conducted to investigate the relationship between maternal smoking during pregnancy and the presence...
A study was conducted to investigate the relationship between maternal smoking during pregnancy and the presence of congenital malformations in the child. Among children who suffer from an abnormality other than Down’s syndrome or an oral cleft, 32.8% have mothers who smoked during pregnancy. You wish to determine if this proportion is the same for those children born with an oral cleft. In a random sample of 27 infants with an oral cleft, 15 had mothers who smoked during pregnancy....
Discuss the teratogenic impact of smoking during pregnancy. What specific effects might smoking have on the...
Discuss the teratogenic impact of smoking during pregnancy. What specific effects might smoking have on the fetus? Which are the main considerations, issues, and findings in the area? During what stage of prenatal development might smoking have the most detrimental impact? Explain why.
Information: An Ob/Gyn collected data on the smoking status of the mother during pregnancy, and whether...
Information: An Ob/Gyn collected data on the smoking status of the mother during pregnancy, and whether the child was born premature (37 weeks or fewer of gestation). The results were as follows: Pre-mature birth status Cases Non-cases Total Smoking Status during Pregnancy Smoked 36 370 406 Never smoked 168 3396 3564 Total 204 3766 3970 (1) Calculate and interpret the odds ratio to determine if smoking throughout pregnancy is related to premature birth. (2 pts) 2) Do these data provide...
Smoking during pregnancy can cause a baby to be born too early or to have low...
Smoking during pregnancy can cause a baby to be born too early or to have low birth weight. Design a study that would test this statement.? Describe the problem? What is the sample size? Variable should be define? Parametric or nonparametric? Make the conclusion?
Researchers collected data to examine the relationship between pollutants and preterm births in Southern California. During...
Researchers collected data to examine the relationship between pollutants and preterm births in Southern California. During the study air pollution levels were measured by air quality monitoring stations. Specifically, levels of carbon monoxide were recorded in parts per million, nitrogen dioxide and ozone in parts per hundred million, and coarse particulate matter PM10 in μμg/m3. Length of gestation data were collected on 143,196 births between the years 1989 and 1993, and air pollution exposure during gestation was calculated for each...
Researchers collected data to examine the relationship between pollutants and preterm births in Southern California. During...
Researchers collected data to examine the relationship between pollutants and preterm births in Southern California. During the study air pollution levels were measured by air quality monitoring stations. Specifically, levels of carbon monoxide were recorded in parts per million, nitrogen dioxide and ozone in parts per hundred million, and coarse particulate matter PM10 in μμg/m3. Length of gestation data were collected on 143,196 births between the years 1989 and 1993, and air pollution exposure during gestation was calculated for each...
Prior research has shown a significant relationship between maternal smoking during pregnancy. Investigators at University Anywhere...
Prior research has shown a significant relationship between maternal smoking during pregnancy. Investigators at University Anywhere were interested in looking at whether or not there was a dose response between smoking and low birth weight. They collected data from 500 women receiving prenatal care at a local health center and categorized their smoking status at their first prenatal visit into the following categories: (1) never smokers, (2) former smoker (quit smoking) (3) non-daily smoker (currently smokes but not every day)...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT