A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 4.2. A sample of 37 honors students is taken and is found to have a mean GPA equal to 4.3. The population standard deviation is assumed to equal 0.40. The parameter to be tested is Multiple Choice O the mean GPA of all university students O the mean GPA of 4.3 for the 37 selected honors students O the mean GPA of all university honors students O the proportion of honors students with a GPA exceeding 4.2