The regional sales manager of a large paper corporation is attempting to detect a difference equal to one deal in the average number of deals closed per week by his employees. To check this, he records the number of deals that random salespeople make on a random week. He finds the variance of the number of deals that the random salespeople made to be 9. He runs a statistical test with to test the null hypothesis against his alternative hypothesis . What is the probability of a Type II error? Assume simple random sampling, variance homogeneity, and that the number of deals closed is approximately normally distributed.