Children raised by gay and lesbian parents are more likely to be homosexual than children raised by straight parents

Any birth which occurs 35 or fewer weeks after conception is considered to be

preterm. very low birthweight. pregestational. nonviable.

Two separate samples are being used to estimate the population mean difference between two treatment conditions. Which of the following would produce the widest confidence interval?

a. n1 = n2 = 10 with a pooled variance of 10 b. n1 = n2 = 10 with a pooled variance of 100 c. n1 = n2 = 20 with a pooled variance of 10 d. n1 = n2 = 20 with a pooled variance of 100