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Chapter 7 Activity Instructions: Show all work when applicable. This can be done online or by hand. Once completed, upload activity to Canvas as a Word or PDF file or take a picture if done by hand. T 10. In your own words, explain what the null hypothesis is. What are Type | and Type Il errors? What is a? Why do we phrase null and alternative hypotheses with population parameters and not sample means? If our null hypothesis is \"Hy: p = 40,\" what are the three possible alternative hypotheses? Why do we state our hypotheses and decision criteria before we collect our data? Why do you calculate an effect size? Determine whether you would reject or fail to reject the null hypothesis in the following situations: = 1.99, two-tailed test at a = .05 =0.34, z* = 1.645 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 =78 and = 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. You get hired as a server at a local restaurant, and the manager tells you that servers' tips are $42 on average but vary about $12 (u = 42, o = 12). You decide to track your tips to see if you make a different amount, but because this is your first job as a server, you don't know if you will make more or less in tips. After working 16 shifts, you find that your average nightly amount is $44.50 from tips. Test for a difference between this value and the population mean at the a = .05 level of significance