Suppose we wish to test H _0: μ = 45 vs. H _1: μ > 45. What will result if we conclude that the mean is greater than 45 when the actual mean is 50?
a. We have made both a Type I error and a Type II error.
b. We have made a Type I error.
c. We have made a Type II error.
d. We have made the correct decision.