Assume that the heights of adult puffins are normally distributed, with a mean of = 13.6 inches and a standard deviation of o = 2.6 inches. For a random sample of 39 puffins, answer the following: What is the mean of the distribution of ? 13.6 What is the standard deviation of the distribution of ? What is the probability of obtaining a sample mean height less than 12.3 inches? What is the probability of obtaining a sample mean height greater than 14.2 Inches? Check Answer