1. Explain what the null hypothesis is not using textbook response
2. What is a?
3. If our null hypothesis is "H0 : m = 40," what are the three possible alternative hypotheses?
4. Why do you calculate an effect size?
5. You are part of a trivia team and have tracked your team's performance since you started playing, so you know that your scores are normally distributed with m = 78 and s = 12. Recently, a new person joined the team, and you think the scores have gotten better. Use hypothesis testing to see if the average score has improved based on 9 weeks' worth of score data where M is 88.75.