The Graduate Management Admission Test (GMAT) is taken by individuals interested in pursuing graduate management education. GMAT scores are used as part of the admissions process for more than 6100 graduate management programs worldwide. The mean score for all test‑takers is 550 with a standard deviation of 120. A researcher in the Philippines is concerned about the performance of undergraduates in the Philippines on the GMAT. She believes that the mean scores for this year's college seniors in the Philippines who are interested in pursuing graduate management education will be less than 550. She has a random sample of 250 college seniors in the Philippines interested in pursuing graduate management education take the GMAT. Suppose we know that GMAT scores are Normally distributed with standard deviation σ=120. (a) We seek evidence against the claim that µ=550. What is the sampling distribution of the mean score x¯ of a sample of 250 students if the claim is true?The sampling distribution is approximately Normal, with mean =550 and standard deviation=0.48. The sampling distribution is approximately Normal, with mean =550 and standard deviation≈22.82. The sampling distribution is approximately Normal, with mean =550 and standard deviation=120. The sampling distribution is approximately Normal, with mean =550 and standard deviation≈7.59.