A researcher found that 54 out of 66 trees sampled in an arboretum were native species to

Question:

A researcher found that 54 out of 66 trees sampled in an arboretum were native species to the area. Using these data, he calculated a 95% confidence interval as (0.71,0.89).15
(a) The confidence interval is an estimate of what quantity?
(b) Write a sentence that interprets the confidence interval in the context of this setting.