M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

A sound recording of a particular parrot is played at various decibel levels to volunteers as part of a study. At 20 dB, 25% of volunteers are able to hear a stimulus, whereas at 30 dB, 50% of volunteers hear the stimulus. It is noted that at 35 dB, 50% of volunteers state correctly that the sound is that of a parrot. Which of the following correctly states the recognition threshold for this stimulus?

A

less than 20 dB

B

30 dB

C

35 dB

D

greater than 35 dB