Friday

July 25, 2014

July 25, 2014

Posted by **Steven** on Friday, December 20, 2013 at 12:33pm.

• A researcher wants to determine the difference between the gestational period (period of pregnancy) for two groups of women, namely, those who had normal pregnancies (group A) and those who suffered from a certain complication during pregnancy known as preeclampsia (group B). The following data shows the gestational periods (in weeks) for a sample of 14 women from group A and of 13 women from group B.

Gestational periods for sample from group A: 40, 41, 38, 40, 40, 39, 39, 41, 41, 40, 40, 40, 39, 38

Gestational periods for sample from group B: 38, 30, 32, 42, 30, 38, 35, 32, 38, 39, 29, 29, 32

Find a 95% confidence interval for the difference between the gestational periods of group A and group B, i.e., group A mean minus group B mean. Assume that the variances of the two groups are equal. State any other assumptions you make

**Related Questions**

Math Statistics - 5. Students in an introductory statistics class were asked to ...

Statistics - A confidence interval was used to estimate the proportion of ...

Statistics - In 1998 a San Diego Reproductive clinic reported 49 live births to ...

Statistics - In a survey of 633 males ages 18-64, 395 say they have gone to the...

Statistics - Angela is conducting a poll on campus to determine the next student...

Statistics - Use the sample data and confidence level to construct the ...

Statistics - Answer the question Yes or No. Sam computed a 90% confidence ...

statistics - A sample of n = 9 has a mean of M = 72 with SS = 162. Use the ...

statistics - A sample of n = 9 has a mean of M = 72 with SS = 162. Use the ...

Statistics 7 - A doctor wants to estimate the HDL cholesterol of all 20 to 29 ...