Which of these was a strategy used by cigarette companies during the 1950's to find research showing that smoking did not harm your health?
Over-Precision
Statistical Ignorance
Embellishing Personal Credentials
Repetitious Research

Out of the 150 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking?