Research question: Is the mean test score in the population of all students greater than 90 points? Ho: H = 90 Ha: H > 90 Data were collected from a random sample of 22 students. In that sample, the mean test score was 92.147 points with a standard deviation of 4.657 points. Researchers are planning to analyze these data by conducting a randomization test in StatKey. What is the expected mean of their randomization distribution? O 2.162 4.657 22 90 92.147