Mathematics, 26.03.2021 06:40 angellll4455

A random sample of 13 students were asked how long it took them to complete a certain exam. The mean length of time was 123.9 minutes, with a standard deviation of 73.0 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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A random sample of 13 students were asked how long it took them to complete a certain exam. The mean...