maths puzzle

123456
Across
  1. 1. The middle number,found by ordering data points
  2. 4. A set of numbers is the middle value
  3. 6. value follow natural order
Down
  1. 1. the most frequent number
  2. 2. a data type expressed in numbers
  3. 3. represents type of data
  4. 5. a data collection tool