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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

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. Level of significance value is 0.05. Draw the graph as well in the answer please

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