Standard deviation = √(n * p * q)
You are given n and p
q = 1 - p
q = 1 -0.2 = 0.8
Standard deviation = √(21 * 0.2 * 0.8)
=√3.36 = 1.83
The answer is A.
The standard deviation for a given binomial distribution and would be the following:
The variable is equivalent to
Substitute the values of and into the equation
Use a calculator to solve for this square root since it would be too hard and complicated to do by hand
Round this to the nearest hundredths place since all answer choices are rounded like that
Thus, the answer is choice A. Let me know if you need any clarifications, thanks!
~ Padoru
Answer:
answer is 1/8
Step-by-step explanation:
hope this helps