Suppose at a pulmonologist’s office the mean age of patients was 50 years of age with a standard deviation of 9 years. Assume patient ages are approximately normally distributed. We pull 25 records randomly and note the age of patients at a Pulmonologist’s office. The ages are as follows: 38, 41, 53, 52, 50, 49, 43, 21, 29, 39, 82, 74, 73 60, 61, 56, 56, 53, 51, 50, 48, 49, 56, 56, 55 (a)  What is the probability that a random sample 25 has this mean(part a) or greater? (b)  Find the probability that random sample of 25 records has a mean age of 53 or greater. (c)  Find the probability that a random sample of 25 records has a mean age between 49 and 51.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.