Find the lower bound of the 90 confidence interval for the


A random sample of 13 students were asked how long it took them on certain exam. The mean length of time was 109.3 minutes with a standard deviation of 77.6 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.

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Basic Statistics: Find the lower bound of the 90 confidence interval for the
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