Thursday

October 30, 2014

October 30, 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

**Answer this Question**

**Related Questions**

MATH Statistics - A student union wants to obtain a 90% confidence interval for ...

statistics 3. - A student union wants to obtain a 90% confidence interval for ...

statistics 3. - A student union wants to obtain a 90% confidence interval for ...

Statistics 3 - A student union wants to obtain a 90% confidence interval for the...

STATISTICS - In a random sanple of 500 students, 80% say they have a part-time ...

Statistics - Professor York randomly surveyed 240 students at Oxnard University...

Math - John has two part time jobs. He works no more than 40 hours per week. He ...

stats - In a random sample of 500 students, 80% say they have a part-time job. ...

math - You are paid $8.55/hr at your part-time job. You work 10 hours per week...

statistics - To determine how many hours per week freshmen college students ...