Chi-square Goodness of Fit test

Consider the following problem: A research firm claims that the distribution of the days of the week that people are most likely to order food for delivery is different from the distribution seen in the past. You randomly select 494 people and record which day of the week each is most likely to order food for […]

Example problem re: Goodness of Fit test:

You are given a six-faced die and asked to determine with 95% confidence if it is “fair.” What are the hypotheses? Answer: the null H0: the die is fair, p1 = p2 = … = p6 = 1/6; the alternative Ha: the die is not fair, at least one pi ≠ 1/6. What is the […]

The F-test using Excel

I teach graduate statistics, otherwise known as quantitative methods/analytics. I have found a lot of good statistics tutorials on You Tube and have recommended some to my students. Because these students are MBA students and not Ph.D. students, I am more concerned with my students leaving the course knowing how to use technology to help them solve business problems […]