Confidence Interval for μ when σ is Unknown

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A professor at a university wants to estimate the time his students spend on their homework.

He collects a random sample of $61$ students. On average, these students spent $8.2$ hours a week on their homework with a standard deviation of $s=1.8$ hours.

Construct a $96\%$ confidence interval for the population mean $\mu$ . Round your answers to $3$ decimal places.

$CI_{\mu,\,96\%}=\,($

$,\,\,\,$

$)$

7. Hypothesis Testing: One-sample t-test

Confidence Interval for μ when σ is Unknown