Question: Finally, you decided you would like to also find a 90% confidence interval around the mean for the amount of money people spent related to

Finally, you decided you would like to also find a 90% confidence interval around the mean for the amount of money people spent related to the eclipse. For this analysis, use your previous data from questions 7-11, where you sampled 30 friends and found that they spent an average of $145, with a sample standard deviation of $12. What would be the lower bound for this confidence interval (to 3 decimal places)

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