updated typo fix

[stats_class_2019.git] / problem_sets / week_03 / ps3-worked_solution.Rmd

diff --git a/problem_sets/week_03/ps3-worked_solution.Rmd b/problem_sets/week_03/ps3-worked_solution.Rmd
index 76e2c63a2a65b75668cda12d4fd121f085c93597..0004b6ac42a5105989665c864c9c70544ee7c772 100644 (file)
--- a/problem_sets/week_03/ps3-worked_solution.Rmd
+++ b/problem_sets/week_03/ps3-worked_solution.Rmd
@@ -302,6 +302,6 @@ choose(10,2)*0.07^2*0.93^8
 
 (d) Is random assignment to tents likely to ensure $\leq1~arachnophobe$ per tent?
    
- Random assignment and the independence assumption means that the answer to part c is the inverse of the outcome we're looking to avoid: $P(\gt1~arachnophobes) = 1-P(\leq1~arachnophobe)$. So, $P(\gt1~arachnophobes) = 1-0.84 = 0.16 = 16\%$. Those are the probabilities, but the interpretation really depends on how confident the camp counselor feels about a $16\%$ chance of having multiple arachnophobic campers in one of the tents.
+ Random assignment and the independence assumption means that the answer to part c is the complement of the outcome we're looking to avoid: $P(\gt1~arachnophobes) = 1-P(\leq1~arachnophobe)$. So, $P(\gt1~arachnophobes) = 1-0.84 = 0.16 = 16\%$. Those are the probabilities, but the interpretation really depends on how confident the camp counselor feels about a $16\%$ chance of having multiple arachnophobic campers in one of the tents.