Question: A psychologist is collecting data on the time it takes to learn a certain task. For 50 randomly selected adult subjects, the sample mean is 16.40 minutes and the sample standard deviation is 4.00 minutes. Construct the 95% confidence interval for the mean time required by all adults to learn the task.

1. [8.56 24.24]
2. [15.47 17.33]
3. [16.24 16.56]
4. [15.29 17.51]
5. [17.12 48.48]

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