During a severe storm, electrical transformers that function independently are expected to operate 85 percent of the time. Suppose 20 electrical transformers are randomly selected from the population. Let the random variable T represent the number of electrical transformers operating during a severe storm. Which of the following is the best interpretation of the random variable T? a. It is a binomial variable with mean 17 transformers and standard deviation â2.55 transformers.
b. It is a binomial variable with mean 17 severe storms and standard deviation â2.55 severe storms.
c. It is a binomial variable with mean 0.85 transformer and standard deviation 20 transformers.
d. It is a variable that is not binomial with mean 17 transformers and standard deviation â2.55 transformers.
e. It is a variable that is not binomial with mean 0.85 severe storm and standard deviation 20 severe storms.