6. A university wants to promote the graduates of its honors program. At present it is stated that the GPA of the graduates is 3.5 or below. The university wants to prove at a 90% confidence that the mean GPA of these graduates exceeds 3.50. A sample of 28 university honors program students is taken and is found to have a mean GPA equal to 3.6. The sample standard deviation is 0.40. a) In testing the university's belief, write the appropriate hypotheses at 10% level of significance. crit = a= Ho: H