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3.4 Exercise 2

Avg difficulty 2.5

the table shows the number of athletes who stretch before exercising and how many had injuries within the past year.

Injury in Past Year No Injury in Past Year Total
Stretches 55 295 350
Does not stretch 231 219 450
Total 286 514 800

  1. What is P(Athlete stretches before exercising)?
  2. What is P(Athlete stretches before exercising|no injury in the last year)?

OpenStax Statistics, 3.4 Contingency Tables, exercise 2

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