Doing yoga with goats has been shown to increase the likelihood that a client will recommend a friend. In one study,a sample of 16 yoga classeswere identified to have goats added to the class and number of client referrals over the following 3 months was tracked.Researchers already know that client recommendations are normally distributed and that the general population of yoga classes have a recommendation rate of 20%,population mean = 20 standard deviation = 25 .The sample(n=16) produces a mean score ofM=31.