Confidence Intervals for Population Mean: Videos & Practice Problems

Agricultural scientists want to verify whether a new oak cultivar meets the standard mean leaf length of $13.0$ cm. They measure the lengths of $8$ randomly selected leaves and obtain (in units of cm): $\{12.5,13.1,11.8,14.0,13.5,12.9,13.2,12.7\}$.
Using $10$ bootstrap samples (with the replacement) of size $8$, they compute the following sorted bootstrap sample means (in cm): $12.50,12.60,12.80,12.90,13.00,13.10,13.20,13.30,13.50,13.60$. Construct a $90\%$ confidence interval for the true mean leaf length.