A simple random sample of 37 adults is obtained, and each person's white blood cell count (in thousand cells per microliter) is measured. The sam- ple mean is 4.1 thousand cells per microliter, and the sample standard deviation for red blood cell counts is 0.85 thousand cells per microliter (the population standard deviation is unknown). Construct and execute a hypothesis test capa- ble of providing support for the claim that the mean red blood cell count of the population is more than 4.0 thousand cells per microliter (a value often used for the lower limit of the range of normal values). Use a 0.10 significance level. Be sure to state the conclusion of the test clearly.