21 The number of times x an adult human breaths per minute

Last updated: 11/8/2023

21 The number of times x an adult human breaths per minute when at rest has a probability distribution that is approximately normal with the mean 16 and standard deviation 4 a If a person is selected at random and the number x of breaths per minute while at rest is recorded what is the probability that x will exceed 22 b If another person is recorded to have been taking 10 breaths per minute is that unusual