The PROBTICS Symbols

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Across
  1. 3. middle value of random variable x
  2. 5. probability of events A
  3. 8. value that occur most frequently in population
  4. 10. ∑∑
  5. 11. σ value of random variable x
  6. 12. var(X)
  7. 13. expected value of random variable X
  8. 14. means of population values
Down
  1. 1. expected value of random variable X and Y
  2. 2. MR
  3. 4. summation-sum of all values in range of series
  4. 6. population values
  5. 7. correlation of random variables x and y
  6. 9. cov of random variables X and Y