# Josiah Allen

Statistics teacher | Verified Expert

I earned my degree in Statistics from the University of Alabama at Birmingham, where I developed a strong foundation in data analysis and quantitative reasoning. I have a passion for teaching and helping students understand complex statistical concepts. With my academic background and teaching experience, I am equipped to provide clear explanations and effective guidance in Statistics and related subjects. I am committed to helping students succeed and reach their academic goals.

## Questions

What does an R-Squared value indicate about a linear regression?

The probability that a new spark plug is defective is 0.06. You need two new spark plugs. What is the probability that both spark plugs are defective?

The student council advisor needs to appoint two council members to be officers: one president and one vice-president. Student council consists of six members. How many possible ways are there for the advisor to fill the offices?

How do you interpret the intercept of a linear regression?

How do I find the variance in 40; 56; 59; 60; 60; 62; 65; 69; 75; 84 statistics?

What is an F-test for the equality of variances?

What can covariance be used for?

- How do I calculate the covariance between 2 risky assets?
- What are the mean and standard deviation of a probability density function given by #Pr(X=k) = (4^ke^-4)/(k!) # for #k in {0,1,2... oo}#?
- What is the difference between variance and variability?
- What are the mean and standard deviation of a binomial probability distribution with #n=5 # and #p=1/32 #?
- How do i describe and explain the position of a median on a box plot?
- The sum of all X's is 3780. The sum of all X^2 is 80000. The sample N = 180. How can I calculate the variance?
- Is the speed of an airplane discrete or continuous?
- What are the mean and standard deviation of a binomial probability distribution with #n=145 # and #p=7/11 #?
- What is discrete, categorical, ordinal, numerical, non-numerical and continuous data?
- What is a random variable? What is an example of a discrete random variable and a continuous random variable?
- The number of accidents is .4 accidents / day. What is the probability that the time from now to the next accident will be more than 3 days?What is the probability that the the time from now to the 3rd accident will be more than 5 days?
- A recipe has 6 ingredients, how many ways can you arrange the first 4 ingredients?
- What does "correlation vs causation" mean in statistics?