Practice questions

Let’s try to practice the material in this chapter with a few example questions.

Questions

1. An e-commerce website runs an A/B study comparing two different website designs to see which generates more sales. What is the null hypothesis?
   1. There is a statistically significant difference between group A and group B
   2. Group A will be higher than group B
   3. Group B will be higher than group A
   4. Statistically, there is no significant difference between group A and group B
2. The A/B study from the previous question was finished. With an alpha of 0.05, the results were a p-value of 0.04. What do these results mean?
   1. You should accept the null hypothesis and reject the alternative hypothesis
   2. You should accept the alternative hypothesis and reject the null hypothesis
   3. You should accept the null hypothesis and the alternative hypothesis
   4. You should reject BOTH the null and alternative hypotheses
3. A small pet shop ran a study to see whether dog owners bought more pet food...