Report a p-value for the following hypothesis test.
Without looking, in 4 out of 5 tries, Tony correctly identifies a picture as one of 5 shapes: circle, square, triangle, wave, or star. Does this sample provide sufficient evidence that Tony has ESP (extra-sensory perception)?
In other words, does this sample provide sufficient evidence that in the long run Tony would get a higher percentage right than the 20% rate of a person who is just guessing?
Test | Ho: p = 0.2. Tony is just guessing. |
Versus | Ha: p > 0.2. Tony has ESP. |
(Write your answer as a decimal).
