In a ock of 300 hens, the mean number of eggs laid in a year was 150, with a standard deviation of 28.1. If a random sample of 40 hens is taken to see how many eggs they laid, what is the probability that the sample mean number of eggs laid by the 40 hens is greater than 155? Use zscore formula and normal probability table to get the answer. If you use your calculator, your answer will be slightly different but still close. W