Consider a population of 250 with a mean of 50 and a standard deviation equal to 28. What is the probability of obtaining a sample mean of 51 or less from a sample of45? Click here to view page 1 of the Cumulative Standardized Normal Table. Click here to view page 2 of the Cumulative Standardized Normal Table. What is the probability of obtaining a sample mean of 51 or less from a sample of 45? P (is 51) = (Round to four decimal places as needed.)