Variance and the Standard Deviation
January 26th, 2023
In San Francisco, 30% of workers take public transportation daily.
a) In a sample of 10 workers, what is the probability that exactly three workers take the public transport daily? [Hint: It is a Binomial Distribution Problem.]
b) In a sample of 10 workers, what is the probability that at least three workers take the public transport daily?
P(x?3)=1-f(0)- f(1)- f(2)
P(x?3)=1-f(0)- f(1)- f(2) =
c) How many workers are expected to take the public transportation daily?
d) Compute the variance and the standard deviation of the number of workers that will take the public transport daily.
Standard Deviation =