At a large midwestern college, 4% of the students are hispanic. a random sample of 20 students from the college is selected. let x denote the number of hispanics among them. the standard deviation of x is:
Binomial distribution is used Standard deviation = [tex] \sqrt{n*p*q} [/tex] where [tex]n=20[/tex] [tex]p=4[/tex]% [tex]=0.04[/tex] [tex]q = 1 - p = 1 - 0.04 = 0.96 [/tex]
