Question: We would like to conduct a hypothesis test to determine whether the true mean score of all teams in an ultimate frisbee tournament differs from

We would like to conduct a hypothesis test to determine whether the true mean score of all teams in an ultimate frisbee tournament differs from 9. The mean and standard deviation of the scores of 4 randomly selected teams are calculated to be 13 and 3, respectively. Scores of all teams in the league are known to follow a normal distribution. We find a 90% confidence interval of (11.24, 14.76). What is the correct conclusion of the test using the confidence interval method

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