Question

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 100 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 90% confidence interval to estimate the length of pregnancy for women who smoke. (Note: The critical z -value to use, z c , is: 1.645)

Homework Answers

Answer #1

Dear student,
I am waiting for your feedback. I have given my 100% to solve your queries. If you satisfied with my answer then please please like this.
Thank You

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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 107 pregnant women who were smokers. The average pregnancy length for this sample of smokers was 264 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 138 pregnant women who were smokers. The average pregnancy length for this sample of smokers was 255 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...
Researchers asked pregnant women if they are currently smoking during this pregnancy and afterwards followed them...
Researchers asked pregnant women if they are currently smoking during this pregnancy and afterwards followed them through childbirth to test the association between smoking during pregnancy and stillbirth. Some smokers reported not smoking, resulting in some who were exposed being labeled as not exposed. What kind of bias is this? Do you think false reporting is more likely in one of the two groups (stillbirth, live birth) or equally likely?
4. A woman who smokers during pregnancy increase health risks to the infant so that it...
4. A woman who smokers during pregnancy increase health risks to the infant so that it is known that about 20% (1/5) of female smokers quit smoking during pregnancy. Suppose that a random sample of 400 pregnant women who smoked prior to pregnancy contained 62 who quit smoking during pregnancy. a. What is the point estimator for p, the population of female smokers who quit smoking during pregnancy? b. What are the assumptions (requirements) for constructing a confidence interval for...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT