A Confidence Interval When the Population Standard Deviation Is Unknown and Small Sample Case · Example 1

The average earnings per share (EPS) for 10 industrial stocks randomly selected from those listed on the Dow-Jones Industrial Average was found to be $\bar{X}$ = 1.85 with a standard deviation of s=0.395. Calculate a 99% confidence interval for the average EPS of all the industrials listed on the DJIA.
$\bar{x}-t_{v,\alpha }\left(\frac{s}{\sqrt{n}}\right)\le \mu \le \bar{x}+t_{v,\alpha }\left(\frac{s}{\sqrt{n}}\right)$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Introductory Business Statistics 2e · §8.2 A Confidence Interval When the Population Standard Deviation Is Unknown and Small Sample Case · Example 1