At a large Midwestern college, 4 % 4% of the students are Hispanic. A random sample of 20 students from the college is selected. Let X X denote the number of Hispanics among them. The standard deviation of X X is:. a) 0.88. b) 0.8. c) 0.768. d) 0.71

option a

Step-by-step explanation:

given that at a large Midwestern college, 4 % 4% of the students are Hispanic.

A  random sample of 20 students from the college is selected.

We have each student is independent of the other to be hispanic

p = success = being hispanic = 0.04 while

q = failure = being non hispanic = 0.96

X - no of hispanics is thus binomial with p = 0.04 and n =20 (sample size)

Since X is binomial

Var(x) = npq = 0.768

Std dev (x) = Square root of variance =

rounded off it gives 0.88

So option a is right

the cat is blue because the probability of extension towards the prefix of the diameter of the circle could only mathematically equal to the sum of the roots of the carrots from   your garden.

step-by-step explanation:

john got lost so he didn't know what to do and it was crazy because he didn't except it

step-by-step explanation:

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