Is RDW 18 high, normal or dangerous? What does Red cell distribution width level 18 mean?

Is RDW CV 16 high, normal or dangerous? What does RDW CV level 16 mean?

Is RDW 16.3 high, normal or dangerous? What does Red cell distribution width level 16.3 mean?

Is RDW 15.5 high, normal or dangerous? What does Red cell distribution width level 15.5 mean?

Is RDW 14.7 high, normal or dangerous? What does Red cell distribution width level 14.7 mean?

Is RDW 15.2 high, normal or dangerous? What does Red cell distribution width level 15.2 mean?