Tuesday

March 3, 2015

March 3, 2015

Posted by **Steven** on Monday, December 16, 2013 at 9:38pm.

• 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.

Hint: This relates to confidence interval for

- Statistics 3 -
**MathGuru**, Tuesday, December 17, 2013 at 7:08pmSee your latest post.

**Answer this Question**

**Related Questions**

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

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

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

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

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

statistics - The Office of Student Services at a large western state university ...

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