The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual. For a sample of n = 69, nd the probability of a sample mean being less than 20.2 it p = 20 and 0' = 1.23. a Click the icon to view page 1 of the standard normal table. a Click the icon to view page 2 of the standard normal table. w____'_._- For a sample oln = 69. the probability of a sample mean being less than 20.2 if p = 20 and o = 1.23 is E]. (Round to four decimal places as needed.)