Sensitivity is the proportion of patients with disease who test positive. In probability notation: P(T+|D+) = TP / (TP+FN). Specificity is the proportion of patients without disease who test negative. In probability notation: P(T-|D-) = TN / (TN + FP). Pretest Probability is the estimated likelihood of disease before the test is done. It is the same thing as prior probability and is often estimated.
Billed as An Aquarian Exposition: 3 Days of Peace & Music, it was held at Max Yasgur's 600-acre (240 ha; 0.94 sq mi) dairy farm in the Catskills near the hamlet of White Lake in the town of Bethel. Bethel, in Sullivan County, is 43 miles (69 km) southwest of the town of Woodstock, New York, in adjoining Ulster County.
(It actually took place in Bethel, which is about an hour and a half southwest, close to Narrowsburg.) That didnât stop Woodstock from becoming a bohemian destination though; for many years, the streets were lined in touristy gift stores and head shops.