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A random sample of 13 students were asked how long it took them to finish a certain exam. The mean length of time was 125.7
A random sample of 13 students were asked how long it took them to finish a certain exam. The mean length of time was 125.7 minutes, with a standard deviation of 82.4 minutes. Find the lower bound of the 90% confidence interval for the true mean length of time it would take for all students to complete the exam. Round to one decimal place.
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