Suppose that, globally, the blind spot size (in degrees) for people with normal vision follows a distribution with a mean of 6 degrees and a standard deviation of 0.5 degrees. What is the sampling distribution of the average blind spot size x if we use a sample size of 50 individuals? O X ~ N(6, 0.25) O X ~ N(6, 0.5) O X ~ N(6, O X ~ N(6, 0.25 50 O X ~ N( 9, 0.5)