A sample of 100 people is classified by gender (male/female) and by whether or not they are registered voters. The sample consists of 80 females and 20 males, and has a total of 60 registered voters. If these data were used for a chi-square test for independence, what is the expected frequency for males who are registered voters?
A) 12
B) 20
C) 40
D) 60
Question 2
If other factors are held constant, which set of sample characteristics is most likely to produce a significant t statistic?
A) n = 25 with s2 = 100
B) n = 25 with s2 = 400
C) n = 100 with s2 = 100
D) n = 100 with s2 = 400
Female tortoiseshell-and-white cat
Female scorpion Compsobuthus werneri carrying its young (white)
Sexual swellings are one way for females to advertise their mating availability, thereby inducing ma
Negative feedback control of the female reproductive hormones.
(left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur