As the distribution above shows, we would expect roughly 95 percent of all 60-person samples drawn from the Changing Lives participants to have a mean weight within two standard errors of the population mean, or roughly between 153 pounds and 171 pounds.* Conversely, only 5 times out of 100 would a sample of 60 persons randomly drawn from the Changing Lives participants have a mean weight that is greater than 171 pounds or less than 153 pounds.
